Convection
Transmission of energy or mass by a medium involving movement of the medium itself. The circulatory movement that occurs in a fluid at a nonuniform temperature owing to the variation of its density and the action of gravity. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed; Webster, 10th ed)
Thermal Conductivity
Diffusion
Coriolis Force
The apparent deflection (Coriolis acceleration) of a body in motion with respect to the earth, as seen by an observer on the earth, attributed to a fictitious force (Coriolis force) but actually caused by the rotation of the earth. In a medical context it refers to the physiological effects (nausea, vertigo, dizziness, etc.) felt by a person moving radially in a rotating system, as a rotating space station. (From Random House Unabridged Dictionary, 2d ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Hydrodynamics
Hemodiafiltration
Atmosphere
Rheology
Respiratory Transport
Cetylpyridinium
Models, Theoretical
Extracellular Fluid
Heating
Influenzavirus A
Boron Neutron Capture Therapy
Models, Biological
Hemofiltration
Pressure
Air
Biological Transport
Body Temperature Regulation
Microfluidic Analytical Techniques
Water
Temperature
Physics
Hepatitis, Infectious Canine
Dog Diseases
Drug Delivery Systems
Infusions, Intralesional
Infusion Pumps
Fluid propulsion systems driven mechanically, electrically, or osmotically that are used to inject (or infuse) over time agents into a patient or experimental animal; used routinely in hospitals to maintain a patent intravenous line, to administer antineoplastic agents and other drugs in thromboembolism, heart disease, diabetes mellitus (INSULIN INFUSION SYSTEMS is also available), and other disorders.
Gadolinium
Infusion Pumps, Implantable
Implanted fluid propulsion systems with self-contained power source for providing long-term controlled-rate delivery of drugs such as chemotherapeutic agents or analgesics. Delivery rate may be externally controlled or osmotically or peristatically controlled with the aid of transcutaneous monitoring.
Rats, Nude
Solar Activity
United States National Aeronautics and Space Administration
Communication
Astronauts
Acinar flow irreversibility caused by perturbations in reversible alveolar wall motion. (1/141)
Mixing associated with "stretch-and-fold" convective flow patterns has recently been demonstrated to play a potentially important role in aerosol transport and deposition deep in the lung (J. P. Butler and A. Tsuda. J. Appl. Physiol. 83: 800-809, 1997), but the origin of this potent mechanism is not well characterized. In this study we hypothesized that even a small degree of asynchrony in otherwise reversible alveolar wall motion is sufficient to cause flow irreversibility and stretch-and-fold convective mixing. We tested this hypothesis using a large-scale acinar model consisting of a T-shaped junction of three short, straight, square ducts. The model was filled with silicone oil, and alveolar wall motion was simulated by pistons in two of the ducts. The pistons were driven to generate a low-Reynolds-number cyclic flow with a small amount of asynchrony in boundary motion adjusted to match the degree of geometric (as distinguished from pressure-volume) hysteresis found in rabbit lungs (H. Miki, J. P. Butler, R. A. Rogers, and J. Lehr. J. Appl. Physiol. 75: 1630-1636, 1993). Tracer dye was introduced into the system, and its motion was monitored. The results showed that even a slight asynchrony in boundary motion leads to flow irreversibility with complicated swirling tracer patterns. Importantly, the kinematic irreversibility resulted in stretching of the tracer with narrowing of the separation between adjacent tracer lines, and when the cycle-by-cycle narrowing of lateral distance reached the slowly growing diffusion distance of the tracer, mixing abruptly took place. This coupling of evolving convective flow patterns with diffusion is the essence of the stretch-and-fold mechanism. We conclude that even a small degree of boundary asynchrony can give rise to stretch-and-fold convective mixing, thereby leading to transport and deposition of fine and ultrafine aerosol particles deep in the lung. (+info)Cytoplasmic transport of fatty acids in rat enterocytes: role of binding to fatty acid-binding protein. (2/141)
The intracellular movement of fatty acids is thought to be facilitated through codiffusion with fatty acid-binding protein (FABP). This facilitation may occur by decreasing binding to immobile membranes, leading to faster cytoplasmic diffusion. The aims of this study were to measure the intracellular transport of 12-N-methyl-(7-nitrobenzo-2-oxa-1,3-diazol)aminostearate (NBD-stearate) in villus rat enterocytes and to determine 1) the mechanism of its cytoplasmic transport and 2) if its transport rate correlated with the known variation of FABP binding capacity along the length of the small intestine. Two-dimensional laser photobleaching was used to measure the movement of a fluorescent fatty acid NBD-stearate in enterocytes isolated from different segments of rat intestine. The fraction of NBD-stearate found in the cytostol of enterocytes was determined by differential centrifugation. Cytoplasmic transport of NBD-stearate occurred solely by diffusion and not by convection. Diffusion was homogeneous (nondirectional), consistent with isotropic diffusion. The diffusion rate varied with location along the intestine, correlating with the local FABP concentration and measured cytosolic binding. We conclude that cytoplasmic proteins like FABP promote the intracellular transport of fatty acids by enhancing their diffusive flux. We suggest that facilitation is not specific for a particular cell type but occurs in a variety of cells that transport fatty acids and may contain different types of FABP. (+info)Clothing convective heat exchange--proposal for improved prediction in standards and models. (3/141)
Convection is an important determinant for both sensible and evaporative heat exchange. Heat transfer by convection for normal boundary conditions is readily described by simple power functions. Clothing affects convection in various ways and existing characterisation of clothing by its static insulation values produces inaccurate prediction of sensible heat exchange, eventually leading to erroneous risk assessment. The present paper reviews various methods for evaluation of clothing convective (sensible) heat exchange. Based on available data, two equations are proposed for determination of the reduction of the total insulation values obtained under static, still wind conditions as a consequence of wind and walking effects. The equations apply from 0 to 1.84 clo, from 0.2 to 3 m/s and for walking speeds up to 1.2 m/s. The equations are incorporated in ISO 7933 to provide a more realistic and accurate prediction of sensible heat transfer through clothing. (+info)The effects of wind and human movement on the heat and vapour transfer properties of clothing. (4/141)
This paper integrates the research presented in the papers in this special issue of Holmer et al. and Havenith et al. [Holmer, I., Nilsson, H., Havenith, G., Parsons, K. C. (1999) Clothing convective heat exchange: proposal for improved prediction in standards and models. Annals of Occupational Hygiene, in press; Havenith, G., Holmer, I., den Hartog, E. and Parsons, K. C. (1999) Clothing evaporative heat resistance: proposal for improved representation in standards and models. Annals of Occupational Hygiene, in press] to provide a practical suggestion for improving existing clothing models so that they can account for the effects of wind and human movement. The proposed method is presented and described in the form of a BASIC computer program. Analytical methods (for example ISO 7933) for the assessment of the thermal strain caused by human exposure to hot environments require a mathematical quantification of the thermal properties of clothing. These effects are usually considered in terms of 'dry' thermal insulation and vapour resistance. This simple 'model' of clothing can account for the insulation properties of clothing which reduce heat loss (or gain) between the body and the environment and, for example, the resistance to the transfer of evaporated sweat from the skin, which is important for cooling the body in a hot environment. When a clothed person is exposed to wind, however, and when the person is active, there is a potentially significant limitation in the simple model of clothing presented above. Heat and mass transfer can take place between the microclimate (within clothing and next to the skin surface) and the external environment. The method described in this paper 'corrects' static values of clothing properties to provide dynamic values that take account of wind and human movement. It therefore allows a more complete representation of the effects of clothing on the heat strain of workers. (+info)Efficacy of two methods for reducing postbypass afterdrop. (5/141)
BACKGROUND: Afterdrop, defined as the precipitous reduction in core temperature after cardiopulmonary bypass, results from redistribution of body heat to inadequately warmed peripheral tissues. The authors tested two methods of ameliorating afterdrop: (1) forced-air warming of peripheral tissues and (2) nitroprusside-induced vasodilation. METHODS: Patients were cooled during cardiopulmonary bypass to approximately 32 degrees C and subsequently rewarmed to a nasopharyngeal temperature near 37 degrees C and a rectal temperature near 36 degrees C. Patients in the forced-air protocol (n = 20) were assigned randomly to forced-air warming or passive insulation on the legs. Active heating started with rewarming while undergoing bypass and was continued for the remainder of surgery. Patients in the nitroprusside protocol (n = 30) were assigned randomly to either a control group or sodium nitroprusside administration. Pump flow during rewarming was maintained at 2.5 l x m(-2) x min(-1) in the control patients and at 3.0 l x m(-2) x min(-1) in those assigned to sodium nitroprusside. Sodium nitroprusside was titrated to maintain a mean arterial pressure near 60 mm Hg. In all cases, a nasopharyngeal probe evaluated core (trunk and head) temperature and heat content. Peripheral compartment (arm and leg) temperature and heat content were estimated using fourth-order regressions and integration over volume from 18 intramuscular needle thermocouples, nine skin temperatures, and "deep" hand and foot temperature. RESULTS: In patients warmed with forced air, peripheral tissue temperature was higher at the end of warming and remained higher until the end of surgery. The core temperature afterdrop was reduced from 1.2+/-0.2 degrees C to 0.5+/-0.2 degrees C by forced-air warming. The duration of afterdrop also was reduced, from 50+/-11 to 27+/-14 min. In the nitroprusside group, a rectal temperature of 36 degrees C was reached after 30+/-7 min of rewarming. This was only slightly faster than the 40+/-13 min necessary in the control group. The afterdrop was 0.8+/-0.3 degrees C with nitroprusside and lasted 34+/-10 min which was similar to the 1.1+/-0.3 degrees C afterdrop that lasted 44+/-13 min in the control group. CONCLUSIONS: Cutaneous warming reduced the core temperature afterdrop by 60%. However, heat-balance data indicate that this reduction resulted primarily because forced-air heating prevented the typical decrease in body heat content after discontinuation of bypass, rather than by reducing redistribution. Nitroprusside administration slightly increased peripheral tissue temperature and heat content at the end of rewarming. However, the core-to-peripheral temperature gradient was low in both groups. Consequently, there was little redistribution in either case. (+info)Influence of convection on small molecule clearances in online hemodiafiltration. (6/141)
BACKGROUND: Dialysis efficacy is mostly influenced by dialyzer clearance. Urea clearance may be estimated in vitro by total ion clearance, which can be obtained by conductivity measurements. We have previously used this approach to assess in vitro clearances in a system mimicking predilutional and postdilutional online hemodiafiltration with a wide range of QD, QB, and ultrafiltration rates. Our current study elaborates on a formula that allows the prediction of the influence of ultrafiltration on small molecule clearances, and validates the mathematical approach both experimentally in vitro and clinically in vivo data. METHODS: Two conductivimeters in the dialysate side of an E-2008 Fresenius machine were used. HF80 and HF40 polysulfone dialyzers were used; reverse osmosis water and dialysate were used for blood and dialysate compartments, respectively. Study conditions included QB of 300 and 400 mL/min and QD of 500 and 590 mL/min, with a range of ultrafiltration rate from 0 to 400 mL/min in postdilutional hemodiafiltration and to 590 mL/min in predilutional hemodiafiltration. Urea clearances were determined in the in vivo studies, which included 0, 50, 100, and 150 mL/min ultrafiltration rates. RESULTS: The ultrafiltration rate and clearance were significantly correlated (R > 0.9, P < 0.001) and fitted a linear model (P < 0.001) in all of the experimental conditions. The following formula fitted the experimental points with an error <2% for both postdilutional and predilutional online diafiltration in vitro, respectively. K = K0 + [(QB - K0)/(QB)] x ultrafiltration rateK = K0 + [((QD x QB)/(QB + QD) - K0)/QD] x ultrafiltration rate where K is the clearance; K0 is the clearance with nil ultrafiltration rate; QD is the total dialysate produced (in commercial HDF, QD = QDi + Qinf). Since weight loss was maintained at 0, ultrafiltration rate = infusion flow. QB is the "blood" line flow. The formula was also verified in vivo in clinical postdilutional hemodiafiltration with a QB taking into account the cellular and water compartments. DISCUSSION: In vitro, by simply determining the clearance in conventional dialysis, the total clearance for any ultrafiltration rate may be estimated in both predilutional and postdilutional online diafiltration with an error of less than 2%. The same applies to in vivo postdilutional hemodiafiltration when the formula takes into account the cellular and water composition of blood. (+info)Contaminant dispersion in the vicinity of a worker in a uniform velocity field. (7/141)
The transportation of gaseous contaminant from a low and moderate low impulse (momentum<1 m s(-1)) source to the breathing zone was studied in a uniform air stream flow. Results of the effects of the direction and the velocity of principal air flow, convection due to a human body, arm movement of a human being and the type of source on the concentration profiles are presented. Three important results were obtained. Firstly, for a given low and moderate impulse low impulse contaminant source in the near field of a worker, his/her orientation relative to the principal air flow direction is the most important factor in reducing occupational exposure, with an air velocity of about 0.3 m s(-1). Secondly, the effect of convection resulting from body heat on air flow was lower than expected. Thirdly, arm movements influence contaminant dispersion, and should be included when models assessing exposure are developed. The present data can also be used to validate existing computational fluid dynamic (CFD) models. (+info)Monitoring response to convection-enhanced taxol delivery in brain tumor patients using diffusion-weighted magnetic resonance imaging. (8/141)
Convection-enhanced drug delivery (CEDD) is a novel approach to enhance the delivery of drugs directly into brain tumors. We have used diffusion-weighted MRI (DWMRI) to monitor the effects of intratumoral CEDD in three brain tumor patients treated with Taxol. Clear changes in the images and the water diffusion parameters were observed shortly after the initiation of treatment. Initially, a bright area corresponding to decreased diffusion appeared, followed by the appearance of a dark area of increased diffusion within the bright area. The time to appearance of the dark area varied among the patients, suggesting different response rates. In this work, we have demonstrated the feasibility of using DWMRI as a noninvasive tool to achieve unique early tissue characterization not attainable by other conventional imaging methods. (+info)
Convective flows in evaporating sessile droplets | www.icb.ucsb.edu
Finite element computational procedure for convective flow of nanofluids in an annulus<...
Most recent papers with the keyword Convection-enhanced delivery | Read by QxMD
Convection, Rotation and Planetary Transits - definition of Convection, Rotation and Planetary Transits by The Free Dictionary
Gas Convection Apparatus (Ventilation Apparatus, Convection Box) Manufacturer, Gas Convection Apparatus (Ventilation Apparatus,...
Bergen Open Research Archive: Separation and quantification of ionospheric convection sources: 1. A new technique
Biological relationships to convective flow patterns within stream beds | Research Gateway
Natural Convection Induced Oxygen Transport in Liquid Lead Bismuth Eut by Taide Tan, Yitung Chen et al.
Entropy generation for unsteady natural convection and thermal radiation inside a porous enclosure on Environmental XPRT
US20100100061A1 - Method and system for the use of hollow fiber catheters in topical applications
- Google Patents
3. Convection and Solar Radiation - Engineering LibreTexts
The effect of temperature-dependent solubility on the onset of thermosolutal convection in a horizontal porous layer<...
Earth Snapshot • Area of Convection in Pacific Ocean Persists
20 Conduction Convection Radiation Worksheet | Printable Worksheet Template
Gas Convection Apparatus - American Scientific
Natural Convection in a Ternary Gas Mixture-Application to the Naphthalene Sublimation Technique | Journal of Heat Transfer |...
Natural Convection and Conduction in Porous Wall, Solar Collector Systems Without Vents | Journal of Solar Energy Engineering |...
Natural Convection from Circular Cylinders | Sandra Boetcher | Springer
Esco | Natural Convection Laboratory Incubators
Influence of Convection on Eutectic Microstructure | Springer for Research & Development
Convection | physics | Britannica
Efficient In‐Cloud Removal of Aerosols by Deep Convection | ORACLES
MTMT2: Anber Usama M. et al. Probing the Response of Tropical Deep Convection to Aerosol Perturbations Using Idealized Cloud...
OSA | Coupled laser molecular trapping, cluster assembly, and deposition fed by laser-induced Marangoni convection
Analytical Solution Of The Diffusion - Convection Equation Over A Finite Domain. - KFUPM ePrints
Bakery, Convection Systems & Equipment | Food & Beverage - EngNet
Atmospheric Convection and Air-Sea Interactions over the Tropical Oceans: Scientific Progress, Challenges and Opportunities |...
Model Study of Ground Magnetic Signatures of Traveling Convection Vort by Lie Zhu, P. Gifford et al.
Convection in the helium flash | Springer for Research & Development
Modeling of the Kinetics of Capture of Pathogens Enhanced by a Marangoni Flow
Aligarh Muslim University || Department Page
Heat Rises...But How Fast? | U-M LSA Physics
IntechOpen Open Access Publisher - Open Science Open Minds | IntechOpen
Clinical tolerance of corticospinal tracts in convection-enhanced delivery to the brainstem in: Journal of Neurosurgery Volume...
Chronic, intermittent convection-enhanced delivery devices
Convection Enhanced Localized Administration of PRX321 With Real-time Imaging for Therapy of Recurrent Glioblastoma (CLARITY-1)...
Effect of Thermal Modulation on the Onset of Convection in Walters B Viscoelastic Fluid-Saturated Porous Medium<...
International Heat Transfer Conference 12 -
Volume 9, 2002, Marangoni Convection in Closed Cavities - International Heat...
What are the differences between conduction, convection and radiation? | Reference.com
Numerical simulation of forced convection of nanofluid around a circular cylinder - Archives of Thermodynamics - PAN Czytelnia...
HDPE PE pipe additive DX 980 - HDPE Drainage Pipe
Regional simulations of deep convection and biomass burning over South America: 2. Biomass burning aerosol effects on clouds...
International Institute of Earthquake Prediction Theory and Mathematical
Geophysics (IEPT), Russian Academy of Sciences
B3 - Relative impact of surface and aerosol heterogeneities on the initiation of deep convection - Waves to Weather - LMU Munich
Effect of Enhanced Cerebrospinal Fluid Flow on Drug Penetration in Convection Enhanced Delivery
- The University of...
Giant Convection Cells Found on the Sun | Watts Up With That?
THE HOCKEY SCHTICK: New paper has profound implications for current mathematical climate models, convection, airflows, &...
Tropical Depression FRED
Frictional convergence, atmospheric convection, and causality
Taylor dispersion in the presence of time-periodic convection phenomena. Part I. Local-space periodicity - Fingerprint
-...
Precipitation
Adiabatic cooling occurs when air rises and expands.[14] The air can rise due to convection, large-scale atmospheric motions, ... Most precipitation occurs within the tropics[4] and is caused by convection. The movement of the monsoon trough, or ... Robert A. Houze Jr (1997). "Stratiform Precipitation in Regions of Convection: A Meteorological Paradox?". Bulletin of the ... IR works best in cases of deep, vigorous convection-such as the tropics-and becomes progressively less useful in areas where ...
Rayleigh-Bénard convection
... is also sometimes known as "Bénard-Rayleigh convection", "Bénard convection", or "Rayleigh ... Rayleigh-Bénard convection is a type of natural convection, occurring in a plane horizontal layer of fluid heated from below, ... Rayleigh-Bénard convection is one of the most commonly studied convection phenomena because of its analytical and experimental ... a b Pearson, J.R.A (1958). On convection cells induced by surface tension, Journal of Fluid Mechanics. ...
Rain
Adiabatic cooling occurs when air rises and expands.[7] The air can rise due to convection, large-scale atmospheric motions, or ... Robert Houze (October 1997). "Stratiform Precipitation in Regions of Convection: A Meteorological Paradox?". Bulletin of the ... with thunderstorms possible if the atmosphere along the trowal is unstable enough for convection.[75] Banding within the comma ... Graupel and hail indicate convection.[43] In mid-latitudes, convective precipitation is intermittent and often associated with ...
Plate tectonics
Glatzmaier, Gary A. (2013). Introduction to Modeling Convection in Planets and Stars: Magnetic Field, Density Stratification, ... How mantle convection directly and indirectly relates to plate motion is a matter of ongoing study and discussion in ... Lately, the convection theory has been much debated, as modern techniques based on 3D seismic tomography still fail to ... Schubert, Gerald; Turcotte, Donald L.; Olson, Peter (2001). Mantle Convection in the Earth and Planets. Cambridge: Cambridge ...
Lorenz system
is proportional to the rate of convection, y. {\displaystyle y}. to the horizontal temperature variation, and z. {\displaystyle ... This point corresponds to no convection. All orbits converge to the origin, which is a global attractor, when ρ. ,. 1. {\ ... Derivation of the Lorenz equations as a model of atmospheric convection[edit]. The Lorenz equations are derived from the ... Saltzman, Barry (1962). "Finite Amplitude Free Convection as an Initial Value Problem-I". Journal of the Atmospheric Sciences. ...
Jefre Cantu-Ledesma
Convection. Radiation. CD 3-way split w/ The Wind-Up Bird and 1 Mile North (Music Fellowship) Travels In Constants (Vol. 18): ...
Karen E. Daniels
"Convection". www.ds.mpg.de. Retrieved 2019-03-02. "NSF Award Search: Award#1019151 - Workshop Support for "Particulate Matter: ...
Weather front
When the convection is strong and linear or curved, the MCS is called a squall line, with the feature placed at the leading ... In the warm season, lee troughs, breezes, outflow boundaries and occlusions can lead to convection if enough moisture is ... "Convection". Glossary of Meteorology. American Meteorological Society. Retrieved 2006-10-22. "Orographic Lifting". Glossary of ...
Windcatcher
It has a strong cross-breeze from the courtyard, at least partly driven by convection;[4]:Ch. 6[5] it thus uses the courtyard ...
Brunt-Väisälä frequency
In this case, overturning or convection generally ensues. The Brunt-Väisälä frequency relates to internal gravity waves: it is ... Emmanuel, K.A. (1994). Atmospheric Convection. Oxford University Press. doi:10.1002/joc.3370150709. ISBN 0195066308. ... is a measure of the stability of a fluid to vertical displacements such as those caused by convection. More precisely it is the ...
X-Acto
Through 2012, X-Acto sold ceramic and convection space heaters and fans under the Boston brand name. Knife Scalpel Arts and ... "Ceramic Heaters , Heater with Fan , Convection Heater , X-ACTO". 24 May 2012. Archived from the original on 24 March 2012. ...
Henri Bénard
These students studied thermal convection in various regimes, including electroconvection, surface tension-driven convection, ... They went on to attempt 'to define and to measure in a horizontal liquid layer heated from below, the convection currents that ... He also measured the aspect ratio of the cells and discovered that there was a critical temperature below which no convection ... He and his student Avsec published a major review article of their work on thermal convection in 1938. Finally, on 29 March ...
List of geophysicists
... developed theory of convection in the Earth's mantle, applications of fractals and chaos to Earth processes; William Bowie ... mantle convection; sedimentary basin formation; Crafoord Prize Harry Mayne (American, 1913-1990) - exploration geophysicist, ...
Darcy's law
Bejan, A. (1984). Convection Heat Transfer. John Wiley & Sons.. *^ Cunningham, R. E.; Williams, R. J. J. (1980). Diffusion in ... the Brinkman equation is connected to a set of reaction-diffusion-convection equations. ...
Darcy's law
In the proposed model, the Brinkman equation is connected to a set of reaction-diffusion-convection equations. Darcy's law is ... "The physics of a stove-top espresso machine". American Journal of Physics (2008) Bejan, A. (1984). Convection Heat Transfer. ...
Harry Soodak
Osmosis, diffusion, convection. Am. J. Physiol. 235:R3-R17, 1978. Soodak, H. and A.S. Iberall. Forum on osmosis. IV. More on ...
Planetary boundary layer
This is also known as having CAPE or convective available potential energy); see atmospheric convection.) A convective boundary ...
Scale analysis (mathematics)
ISBN 0-262-20019-8. CS1 maint: discouraged parameter (link) Bejan, A. (2004). Convection Heat Transfer. John Wiley & sons. ISBN ...
Heat transfer
Another form of convection is forced convection. In this case the fluid is forced to flow by use of a pump, fan or other ... Another form of convection is forced convection. In this case the fluid is forced to flow by using a pump, fan or other ... It is a measure which determines the relative strength of conduction and convection. R a = G r ⋅ P r = g Δ ρ L 3 μ α = g β Δ T ... Heat convection occurs when bulk flow of a fluid (gas or liquid) carries heat along with the flow of matter in the fluid. The ...
Mantle plume
Small-scale sublithospheric convection; Oceanic intraplate extension; Slab tearing and break-off; Shallow mantle convection; ... Tan, K. K.; Thorpe, R. B. (1999). "The onset of convection driven by buoyancy caused by various modes of transient heat ... doi:10.1016/S0009-2509(98)00248-6. Tan, K.K. & Thorpe, R. B. (1999). "The onset of convection driven by buoyancy caused by ... A mantle plume is a proposed mechanism of convection within the Earth's mantle. Because the plume head partially melts on ...
Adrian Bejan
From 1992 to 1996 he published four more books, Convection in Porous Media, Heat Transfer, Thermal Design and Optimization and ... In 1984 he published Convection Heat Transfer'. In an era when researchers did heat transfer calculations using numerical ... Bejan, Adrian; Khair, Khairy R. (1985). "Heat and mass transfer by natural convection in a porous medium". International ... ISBN 978-0-471-89612-8., updated in 1995, 2004, and 2013: Bejan, Adrian (2013). Convection Heat Transfer (4th ed.). Wiley. ISBN ...
Heat-pipe tectonics
Fowler, A. C. (1985). "Fast Thermoviscous Convection". Studies in Applied Mathematics. 72 (3): 189-219. doi:10.1002/ ... "Three-Dimensional Simulations of Mantle Convection in Io". Icarus. 149 (1): 79-93. Bibcode:2001Icar..149...79T. doi:10.1006/ ...
1975 Pacific hurricane season
Convection subsequently increased. By September 3 it was definitely a tropical cyclone as an eye slowly formed. It then became ...
Crustal recycling
... whole-mantle convection proponents and layered-mantle convection proponents. Layered-mantle convection proponents hold that the ... Whole-mantle (simple) convection proponents hold that the mantle's observed density differences (which are inferred to be ... Mantle dynamics is likely a mix of the two end-member hypotheses, resulting in a partially layered mantle convection system. ... Albarede, F.; Van Der Hilst, R. D. (2002). "Zoned mantle convection". Philosophical Transactions of the Royal Society A: ...
Paper-based microfluidics
Bejan, Adrian (2013). "Frontmatter". Convection Heat Transfer. John Wiley & Sons, Inc. pp. i-xxxiii. doi:10.1002/9781118671627. ...
Physical impacts of climate change
Precipitation and Convection". Intergovernmental Panel on Climate Change. Archived from the original on 2007-11-22. Retrieved ... Precipitation and Convection". Intergovernmental Panel on Climate Change. Archived from the original on 2007-12-09. Retrieved ... Increases in temperature are expected to produce more intense convection over land and a higher frequency of the most severe ... Del Genio, Tony (2007). "Will moist convection be stronger in a warmer climate?". Geophysical Research Letters. 34 (16): L16703 ...
Radiogenic nuclide
p. 3.2 Mantle convection. Retrieved 23 November 2013. Dumé, Belle (27 July 2005). "Geoneutrinos make their debut; Radiogenic ...
Dimictic lake
Cannon, D. J.; Troy, C. D.; Liao, Q.; Bootsma, H. A. (2019-06-28). "Ice‐Free Radiative Convection Drives Spring Mixing in a ... Kelley, Dan E. (1997). "Convection in ice-covered lakes: effects on algal suspension". Journal of Plankton Research. 19 (12): ... Austin, Jay A. (2019-04-22). "Observations of radiatively driven convection in a deep lake". Limnology and Oceanography. 64 (5 ... Bouffard, Damien; Wüest, Alfred (2019-01-05). "Convection in Lakes" (PDF). Annual Review of Fluid Mechanics. 51 (1): 189-215. ...
Rock analogs for structural geology
Balmforth, Neil J.; Rust, Alison C. (May 2009). "Weakly nonlinear viscoplastic convection". Journal of Non-Newtonian Fluid ...
Rossby number
ISBN 81-7764-653-2. B. M. Boubnov, G. S. Golitsyn (1995). Convection in Rotating Fluids. Springer. p. 8. ISBN 0-7923-3371-3. ...
Atmospheric convection - Wikipedia
Buoyant convection begins at the level of free convection (LFC), above which an air parcel may ascend through the free ... The latent heat release from condensation is the determinate between significant convection and almost no convection at all. ... "Open-ocean deep convection".. *^ National Weather Service Forecast Office in Tucson, Arizona (2008). "What is a monsoon?". ... "Shallow/Deep Convection". National Centers for Environmental Prediction. 15 March 1999.. *^ Helen Jones. " ...
Granular convection - Wikipedia
Granular convection has been probed by the use of MRI [8] where convection rolls similar to those in fluids (Bénard cells) can ... Under experimental conditions, granular convection of variously sized particles has been observed forming convection cells ... Granular Convection and Size Separation. The University of Chicago *^ Rosato, A.; Strandburg, K.J.; Prinz, F.; Swendsen, R.H. ( ... If a large particle is involved, it will be moved up to the top by convection flow. Once at the top, the large particle will ...
Convection | physics | Britannica
Natural convection results from the tendency of most fluids to expand when heated-i.e., to become less dense and to rise as a ... Convection, process by which heat is transferred by movement of a heated fluid such as air or water. ... atmosphere: Convection. Vertical mixing (convection) occurs in the atmosphere as well as in bodies of water. This process of ... Natural convection results from the tendency of most fluids to expand when heated-i.e., to become less dense and to rise as a ...
Convection Microwave Ovens - Panasonic India
Free convection | physics | Britannica.com
... referred to as free convection, occurs when the environmental lapse rate (the rate of change of an atmospheric variable, such ... In atmosphere: Convection. This process, referred to as free convection, occurs when the environmental lapse rate (the rate of ... to as free convection (or natural convection), occurs when the environmental lapse rate (the rate of change of an atmospheric ... Alternative Titles: convective turbulence, natural convection. Learn about this topic in these articles:. importance in Earth ...
Convection - Wikipedia
... referred to as a form of convection, e.g. thermo-capilliary convection and Granular convection. Convection occurs on a large ... In thermodynamics "convection" often refers to heat transfer by convection, where the prefixed variant Natural Convection is ... The convection zone of a star is the range of radii in which energy is transported primarily by convection. Granules on the ... A convection cell, also known as a Bénard cell, is a characteristic fluid flow pattern in many convection systems. A rising ...
NN-DF383 Convection Oven - Panasonic Singapore
Marangoni Convection [video] | EurekAlert! Science News
Artisans who make mezcal, a traditional Mexican spirit, have known for centuries that long-lasting bubbles on the surface of the beverage is an indicator that it has been distilled to the right alcohol level. A new study reveals the science behind why that is. In part, it has to do with whats known as the Marangoni effect. Certain chemicals in mezcal cause liquid to convect upwards into the membranes of bubbles, which helps sustain them for a longer period.
convection Archives - Universe Today
Movement, or convection, in this layer is also responsible for all of Earths volcanic and seismic activity. Information about ... A stable atmospheric event thats found here on Earth as well, open cell convection can be compared to the action of boiling ... This in turn is believed to cause the liquid elements to become buoyant, helping to drive convection in the outer core. This ... What were seeing here is thought to be an open cell convection process in Titans upper atmosphere. In open cells, air sinks ...
Convection cell - Wikipedia
The size of convection cells is largely determined by the fluids properties. Convection cells can even occur when the heating ... Such movement is called convection, and the moving body of liquid is referred to as a convection cell. This particular type of ... Convection usually requires a gravitational field, but in microgravity experiments, thermal convection has been observed ... Convection cells can form in any fluid, including the Earths atmosphere (where they are called Hadley cells), boiling water, ...
Convection Oven Cooking Turkey Time Per Pound | eHow
Use a convection oven to speed the turkey cook time per pound. The hot air circulating around the turkey reduces the overall ... Convection Oven Cooking Turkey Time Per Pound By Ruth de Jauregui Updated March 27, 2019 ... Because the convection oven depends on air circulation to speed the cooking process, use a roasting pan with low sides. If you ... A convection oven is a time-saving addition to your kitchen. The primary difference between a conventional oven and a ...
Natural Convection from Circular Cylinders | Sandra Boetcher | Springer
... a single-source resource all cylinder heat transfer correlations Presents an exhaustive treatment of natural convection from ... Natural Convection from Circular Cylinders. Authors. * Sandra Boetcher Series Title. SpringerBriefs in Thermal Engineering and ... This book covers all natural convection heat transfer laws for vertical and inclined cylinders and is an excellent resource for ... Presents an exhaustive treatment of natural convection from cylinders including robust data sets collected from hard-to-find ...
Cuisinart AirFryer Convection Oven Membership Rewards®
AirFryer Convection Oven is a premium full-s ... 7 Cooking Functions - AirFry, Convection Bake, Convection Broil ... TOA-60A - Introducing a healthier way to fry, and so much more! The Cuisinart® AirFryer Convection Oven is a premium full-size ... Enjoy the crunch without the calories and messy cleanup, with the AirFryer Convection Oven from Cuisinart®! Easy ...
CONVECTION-COOLED ELECTRONIC SYSTEM - Adtran, Inc.
A convection-cooled electronic system includes an electronic device and a stand. The electronic device has air intake openings ... In operation, the heat emitted by the electronic components within the device housing creates airflow by convection. Convection ... A convection-cooled electronic system includes an electronic device and a stand. The electronic device has air intake openings ... Embodiments of the invention relate to a system and method in which an electronic device is cooled by air convection through a ...
Convection cell | Definition of Convection cell at Dictionary.com
Southwest Gas: Convection Oven - Business
Best Convection Ovens - Vegetarian Times
Convection ovens boast the ability to cook food faster, more evenly, and with better browning, while also saving energy ... Best Convection Ovens. Convection ovens boast the ability to cook food faster, more evenly, and with better browning, while ... Convection ovens come in a range of different sizes, and most offer a variety of functions designed for different foods, like ... As the most affordable pick here, this Oster oven is a great choice for those who want to add a convection oven to their ...
Rayleigh-Benard Convection
Rayleigh-Bénard Convection. A model of thermal convection. Figure 1: Box filled with water. The bottom plate is heated, the top ... Heat transport by turbulent convection.. J. Fluid Mech. 17, 405 (1963). *Busse, F.H.. Fundamentals of Thermal Convection.. ... Convection in Stars I. Basic Boussinesq Convection.. Ann. Rev Astron. Astrophys. 98, 323 (1971) ... Rayleigh-Bénard convection (RBC) is the buoyancy-driven flow of a fluid heated from below and cooled from above. This model of ...
Samsung Convection Microwave Oven 28 L MC288TVTCSQ/TL | SAMSUNG India
Can you put metal in a convection microwave combo? - Answers
A combination machine like the convection microwave has expanded cooking capabilities, and anyone who ponies up for one of ... if using the convection component. Its just like an oven - same pots and pans, except the cook time is shorter due to the fan ... I own a Panasonic convection micro combo- given to me without the original users instructions. I reheated one of those white ... In a convection and in a conventional oven yes. NOT in a microwave oven. Sure as long as it is not a microwave oven. ...
THERMAL CONVECTION AND CRYSTAL GROWTH. - Nokia Bell Labs
High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection | Nature
Sato, T., Maeda, K., Nagataki, S. et al. High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection. Nature 592 ... High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection. *Toshiki Sato. ORCID: orcid.org/0000-0001-9267-1693 ... I. Neutrino-driven convection, Rayleigh-Taylor instabilities, and the formation and propagation of metal clumps. Astron. ...
Chronic, intermittent convection-enhanced delivery devices
What Is A Convection Microwave? | Whirlpool
Find out what a convection microwave is, how it works, what you can cook in it and how it can benefit you as a second oven in ... Convection oven vs. regular oven. What, exactly, is a convection oven? Learn more to determine if you should stick with ... But did you know investing in convection microwave cooking lets you use your microwave like a second oven? In a convection ... Convection microwave cooking means you can use your microwave to:. *Roast an entire chicken, then bake angel food cake for ...
Clumping pop-corn convection
NASA Astrophysicist Confirms Existence of Giant Convection Cells on Su | NASA
Observations from NASAs orbiting Solar Dynamics Observatory enabled scientists to confirm the existence of giant flows of gases and plasma moving heat from the suns core to its surface, ending 45 years of speculation and helping better understand sunspot activity that can disrupt communications on Earth.
Pie-Pan Convection: Chemistry & Fluids Science Activity | Exploratorium Teacher Institute Project
Visualize the fluid motion of convection cells. This phenomenon occurs all around us but is usually unseen. For this activity, ... Pie-Pan Convection. Its cool to be dense-just watch these convection cells.. Visualize the fluid motion of convection cells. ... Convection happens in all types of fluids and locations. You can discover it in: * Liquids: Convection cells occur in liquids ... This causes the convection cells to widen and become extremely well defined. This slowing of the convection process allows the ...
weather model gfs - france - convection-index [base + 24] | weatheronline
How are convection currents related to density? | Reference.com
Convection currents occur due to the density difference between hot and cold fluids. A fluid that is heated from below expands ... How does convection work?. A: Convection works by transferring heat from a hot substance to a cooler one through the motion of ... Convection currents occur due to the density difference between hot and cold fluids. A fluid that is heated from below expands ... Convection is the only one of the three heat transfer methods to involve the movement of matter. The other two methods, ...
What is a Convection Oven? (with pictures)
A convection oven is an oven that creates a uniform temperature with internal fans. Convection ovens are the best for ensuring ... Im just now learning to use my new convection/microwave oven in our new RV. Can you make toast in the convection oven and if ... I am planning to replace my microwave with a convection oven because of health concerns. Is a convection oven useful in warming ... Does anyone know if you can microwave immediately after using the convection part of the microwave convection oven or do you ...
OvenOvensCurrentsNatural convectionEquationsConvectiveTemperatureEarth'sMass transport by convectionRoiling convection cellsThermalConductionMoistGranularOccursType of convectionExtent of convectionTrue convectionOceanic convectionPhysicsMantleDeep convectionDiffusion ProblemsBakeHeat transferBuoyancyViscosityCavityVelocityAtmosphereAdaptiveOven'sCellsAirflowDensityBulk fluidMicrowavesCookingPlumesAnalytical SolutionsMotionsMotionOccurFlowsCloudsEquationSun'sCatheterIncubatorsGravitationalMovement of a heatedBINDERAtmospheric
Oven49
- A convection oven is a time-saving addition to your kitchen. (ehow.com)
- The primary difference between a conventional oven and a convection oven is the addition of one or two fans to circulate the hot air. (ehow.com)
- When using convection to roast a turkey, the time per pound will vary, depending on the oven temperature. (ehow.com)
- A careful review of your convection oven manual will reveal if it automatically adjusts the temperature of the oven, or if you should reduce the heat by 25 to 50 degrees Fahrenheit to ensure even cooking. (ehow.com)
- You can speed up the turkey cook time per pound by setting the convection oven at the 'normal' 325 to 350 degrees Fahrenheit that you would use for a conventional gas or electric oven. (ehow.com)
- Alternately, you can reduce the convection oven temperature to 300 degrees Fahrenheit and roast the turkey for approximately 20 minutes per pound. (ehow.com)
- Because the convection oven depends on air circulation to speed the cooking process, use a roasting pan with low sides. (ehow.com)
- The Cuisinart ® AirFryer Convection Oven is a premium full-size toaster oven with a built-in air fryer. (americanexpress.com)
- The convection oven, using hot air to help decrease cook times, has become the workhorse and the most widely used appliance in the commercial foodservice industry. (swgas.com)
- Save money now and later with a rebate on a high-efficiency natural gas convection oven and reduce operating and energy costs. (swgas.com)
- Convection ovens boast the ability to cook food faster, more evenly, and with better browning, while also saving energy compared to a traditional oven. (vegetariantimes.com)
- To help you find the best convection oven for your kitchen, we've pulled together four great options. (vegetariantimes.com)
- Using what Breville terms "Element IQ" technology, this Breville convection oven is designed to adjust its heat distribution and power, depending on what you're cooking. (vegetariantimes.com)
- As the most affordable pick here, this Oster oven is a great choice for those who want to add a convection oven to their kitchen without breaking the bank, while still getting impressive features like a removable crumb tray and wide temperature range. (vegetariantimes.com)
- With an impressively large interior that can fit two 16-inch pizzas, this Oster convection oven is the largest option on our list, making it a great choice for those who want to cook large batches or need to serve a crowd. (vegetariantimes.com)
- Boasting the largest capacity on our list and the only option with a French door design, this Oster convection oven is a great option for those in search of a large oven that can cook a ton at one time. (vegetariantimes.com)
- Things cook faster in a convection oven. (answers.com)
- A convection microwave can double as another oven or even serve as the main oven in small spaces like RVs. (whirlpool.com)
- But did you know investing in convection microwave cooking lets you use your microwave like a second oven? (whirlpool.com)
- Convection microwaves do this as well, but also have another function that lets you use your microwave like you might use a small oven. (whirlpool.com)
- What is a Convection Oven? (wisegeek.com)
- Rather than let hot air circulate randomly, a convection oven carefully creates a uniform temperature with internal fans that evenly circulate hot air. (wisegeek.com)
- A convection oven can correct this variation by using a fan that blows pre-heated air throughout the oven and around the food, rather than simply surrounding food with heated air. (wisegeek.com)
- A convection oven may also do a better job at sealing in the juices of meat so dishes taste more flavorful and moist. (wisegeek.com)
- Cooking with a convection oven requires some adjustments, such as figuring out new cook times and temperatures. (wisegeek.com)
- Convection oven primarily concern the transfer of heat via movement of gas or liquid to process food. (wisegeek.com)
- just bought an older RV that has a convection oven, microwave. (wisegeek.com)
- Do you have to preheat a convection oven? (wisegeek.com)
- I just had my convection oven fan motor replaced because the fan stated making a loud noise when it was on. (wisegeek.com)
- Am I to believe him or should there be two fans in order for the convection part of oven to work as such? (wisegeek.com)
- The perfect oven for curing your Kliar e-coated jewelry pieces, this convection oven features an advanced airflow design with patented baffle and squirrel cage fan that ensure a highly effective distribution of heat. (riogrande.com)
- Gas convection double oven. (cheftalk.com)
- F1 code GE profile convection self clean wall oven (95? (fixya.com)
- Industrial Microwave Convection Oven Material that needs to be dried, slips from the feed bin and feed into the cylinder, which is pushed back by the spiral plate. (ipras.org)
- Due to the tilting of the Industrial Microwave Convection Oven, the material flows to the back end under the action of gravity and rotation. (ipras.org)
- Industrial Microwave Convection Oven is broadly divided into: Swing Industrial Microwave Convection Oven, Drum Industrial Microwave Convection Oven, Industrial Dryer. (ipras.org)
- Industrial Microwave Convection Oven is one of the main equipments in mineral processing equipment. (ipras.org)
- A convection oven comes equipped with a fan and exhaust system that actually pulls the hot oven air across the food and then vents it back out. (thekitchn.com)
- Parson feels that this isn't always a bad thing, and that a convection oven is great for cooking some kinds of foods but not others. (thekitchn.com)
- Most convection ovens for the home allow you to choose whether to cook something on the convection setting or a regular oven setting. (thekitchn.com)
- In a convection oven, you'll get that crisp, crackling skin while the interior stays moist and tender. (thekitchn.com)
- We also know from our own experience that the cooking time in a convection oven is about a third that of a normal oven. (thekitchn.com)
- Cooking and reheating dishes is fast and convenient with the Sharp 1000W Large Convection Microwave Oven. (harveynorman.com.au)
- Place rack in the Cuisinart® Exact Heat™ Convection Toaster Oven Broiler in position B. Preheat to 425˚F on Bake or Convection Bake for 10 minutes. (cuisinart.com)
- Test your culinary skills, and put your chef instincts to work with this LG convection microwave oven. (flipkart.com)
- Whether you're cooking for one or preparing dinner for your entire family, this LG convection microwave oven makes the process simple and quick so you're not inconvenienced in any way. (flipkart.com)
- This month, I'm giving away a Breville OV800XL Smart Oven 1800-Watt Convection Toaster Oven with Element IQ to one of you. (foodrenegade.com)
- This Avantco COHANDLE1 handle serves as a direct replacement to the one that came with your Avantco CO-14 countertop convection oven. (webstaurantstore.com)
- Its 4.1 cu. ft. oven capacity provides enough room to cook multiple dishes at once, with Even-Heat True Convection for mouthwatering finishes. (bestbuy.ca)
Ovens16
- Convection ovens take the term 'full of hot air' to an optimistic level. (swgas.com)
- Convection ovens come in a range of different sizes, and most offer a variety of functions designed for different foods, like pizzas, toast, baked goods, and more. (vegetariantimes.com)
- Convection ovens are often more expensive than standard, or radiant, ovens, but they cook food faster, at a lower temperature, and often with better results. (wisegeek.com)
- Most convection ovens also have a broiler, allowing food to be exposed to high heat when required. (wisegeek.com)
- And no to the other Anon-- convection ovens do not produce radioactive energy. (wisegeek.com)
- When convection ovens were first introduced to the home market, they were heralded as the ultimate time saver: "Perfect roast chicken in a third of the time! (thekitchn.com)
- But Evan Kleiman's guest Russ Parsons cautions us that convection ovens aren't always great for everything. (thekitchn.com)
- Parsons says that convection ovens are fantastic for doing any kind of roasting. (thekitchn.com)
- In fact, the dry heat of convection ovens is the best modern-day equivalent to traditional spit-roasting over open flames! (thekitchn.com)
- Convection ovens are also good for cooking some kinds of pastries, particularly pies and cookies. (thekitchn.com)
- What's your opinion on convection ovens? (thekitchn.com)
- There is a huge selection of standalone microwave ovens that come in features like stainless steel, inverter ovens and convection ovens. (harveynorman.com.au)
- VWR Gravity Convection Ovens - Model 52201-300 - Each : Four Sizes-1.0, 2.0, 4.0, 6.0 cu. ft. (egeneralmedical.com)
- Commercial convection ovens are ideal for smaller kitchens that do a lot of baking. (etundra.com)
- Unlike traditional ovens, many convection ovens can sit right on your cabinet and require only a working outlet to work. (etundra.com)
- Convection ovens let you bake more items at a time, so whether you're making cookies, cupcakes, pies or more, you'll always be ready with more inventory to sell! (etundra.com)
Currents17
- Once at the top, the large particle will stay there because the convection currents are too narrow to sweep it down along the wall. (wikipedia.org)
- Atmospheric convection currents can be set up by local heating effects such as solar radiation (heating and rising) or contact with cold surface masses (cooling and sinking). (britannica.com)
- Such convection currents primarily move vertically and account for many atmospheric phenomena, such as clouds and thunderstorms. (britannica.com)
- These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell. (wikipedia.org)
- The food coloring will give your solution some contrast and will allow you to more easily see the convection currents and fluid flow. (exploratorium.edu)
- Adding food coloring highlights the movement of these convection currents. (exploratorium.edu)
- How are convection currents related to density? (reference.com)
- Convection currents occur due to the density difference between hot and cold fluids. (reference.com)
- Where do convection currents flow in the Earth? (reference.com)
- Convection currents flow in the asthenosphere, immediately below the rocky outer lithosphere. (reference.com)
- Convection currents are one of three types of heat transfer, which involve the movement of energy from a warmer object to a cooler object. (reference.com)
- Convection currents start in the Earth's core and mantle. (reference.com)
- How do convection currents move tectonic plates? (reference.com)
- Convection currents move tectonic plates when there is heat inside the mantle that is rising and falling. (reference.com)
- Join Hannah, Nimisha, and special guest Olivia as we create colorful convection currents in our home laboratory! (cctvcambridge.org)
- Aerodynamic measurements taken on the basis of formulae proposed in the literature, to determine the air velocity distribution in convection currents formed on the surface of baths at temperatures well above that of the ambient air, are described in an attempt to obtain data for ventilation design. (ilo.org)
- When convection currents are illustrated they are often painted as arrows with red and blue color, the red one being the direction of warmer currents and the blue ones being the direction of cooler currents. (physicsforums.com)
Natural convection8
- Natural convection results from the tendency of most fluids to expand when heated- i.e., to become less dense and to rise as a result of the increased buoyancy. (britannica.com)
- Heat transfer by natural convection plays a role in the structure of Earth's atmosphere, its oceans, and its [mantle. (wikipedia.org)
- Natural convection also plays a role in stellar physics. (wikipedia.org)
- In thermodynamics "convection" often refers to heat transfer by convection, where the prefixed variant Natural Convection is used to distinguish the fluid mechanics concept of Convection (covered in this article) from convective heat transfer. (wikipedia.org)
- This book covers all natural convection heat transfer laws for vertical and inclined cylinders and is an excellent resource for engineers working in the area of heat transfer engineering. (springer.com)
- 2) I have worked on few turbulence models concerning natural convection and have found v2f model to be most suitable. (cfd-online.com)
- Especially in a design stage, understanding natural convection inside the headlamp will make it possible to shorten its development period, which can be fulfilled by Computational Fluid Dynamics (CFD). (sae.org)
- Analysis of Natural Convection inside an Automotive Headlamp by Using CFD - Temperature Prediction of the Parts by SHT Method," SAE Technical Paper 2001-01-0860, 2001, https://doi.org/10.4271/2001-01-0860 . (sae.org)
Equations7
- Nonlinear equations of the convection-diffusion type with nonlinear sources are used for the description of many processes and phenomena in physics, mechanics, and biology. (springer.com)
- In this work, we consider the family of nonlinear differential equations which are the traveling wave reductions of the nonlinear convection-diffusion equation with polynomial sources. (springer.com)
- It is shown that in the nonstationary case, both with and without account of convection, the general solution to the studied equations can be constructed under certain constraints on the parameters. (springer.com)
- Cell boundary element methods for convection-diffusion equations. (aimsciences.org)
- Adaptive finite volume methods for steady convection-diffusion equations with mesh optimization. (aimsciences.org)
- In this paper, we study finite volume element (FVE) method for convection-diffusion-reaction equations in a two-dimensional convex polygonal domain. (hu-berlin.de)
- 4] Kirane M. , Qafsaoui M. , On the asymptotic behavior for convection-diffusion equations associated to higher order elliptic operators under divergence form , Rev. Mat. (numdam.org)
Convective9
- Buoyant convection begins at the level of free convection (LFC) , above which an air parcel may ascend through the free convective layer (FCL) with positive buoyancy. (wikipedia.org)
- On the other hand, when friction with the side walls or other mechanisms set up a convection roll pattern inside the vibrated container, we found that the convective motion immediately takes over as the dominant mechanism for size separation. (wikipedia.org)
- Convective flow may be transient (such as when a multiphase mixture of oil and water separates) or steady state (see Convection cell). (wikipedia.org)
- Discrete convective cells in the atmosphere can be identified by clouds, with stronger convection resulting in thunderstorms. (wikipedia.org)
- Convection is often categorised or described by the main effect causing the convective flow, e.g. (wikipedia.org)
- Some phenomena which result in an effect superficially similar to that of a convective cell may also be (inaccurately) referred to as a form of convection, e.g. thermo-capilliary convection and Granular convection. (wikipedia.org)
- In contrast, the deep tropics are less disturbed by such synoptic weather variability, and can be idealized as a region, where the radiative cooling is balanced by randomly distributed moist convection, called radiative-convective-equilibrium. (mpg.de)
- This allows for a smooth transition between the only two states (convection on and convection off) allowed in standard convective adjustment schemes. (harvard.edu)
- The procedure also predicts the generation of correlations between temperature and salinity and the presence of convectively induced upgradient fluxes that have been obtained in numerical simulations of heterogeneous convection and that cannot be represented by standard convective adjustment schemes. (harvard.edu)
Temperature13
- Atmospheric convection is the result of a parcel -environment instability, or temperature difference, layer in the atmosphere. (wikipedia.org)
- A necessary (but not sufficient) condition for convection is that the environmental lapse rate (the rate of decrease of temperature with height) is steeper than the lapse rate experienced by a rising parcel of air. (wikipedia.org)
- Forced convection involves the transport of fluid by methods other than that resulting from variation of density with temperature . (britannica.com)
- This process, referred to as free convection , occurs when the environmental lapse rate (the rate of change of an atmospheric variable, such as temperature or density, with increasing altitude) of temperature decreases at a rate greater than 1 °C per 100 metres (approximately 1 °F per 150 feet). (britannica.com)
- Thermal convection can be demonstrated by placing a heat source (e.g. a Bunsen burner) at the side of a glass filled with a liquid, and observing the changes in temperature in the glass caused by the warmer fluid circulating into cooler areas. (wikipedia.org)
- Auto Convect mode, available on all Whirlpool ® Convection Microwaves, automatically adjusts time, temperature and power for common foods. (whirlpool.com)
- Figure 1: Snapshots and vertical temperature structure for the different regimes of convection. (nature.com)
- Figure 4: Critical density contrast Δρ/ρ calculated from equation (2) as a function of the temperature difference Δ T driving convection. (nature.com)
- Mechanical convection technology provide unsurpassed temperature uniformity and stability to ensure fully reproducible results. (spectrumchemical.com)
- Mechanical convection ensures fast heat-up and uniform temperature throughout the chamber for greater drying efficiency. (coleparmer.com)
- The air is in a range of temperature of 16-39° C (289-312 K). I easely modeled the dispersion without convection. (physicsforums.com)
- The team's new finding specifies the way that the temperature of a gas or liquid varies with the distance from a heat source during convection. (ucsb.edu)
- The convection-cooled units deliver 300W continuous output power over a -40°C to 85°C temperature range without derating. (railway-technology.com)
Earth's5
- Movement, or convection, in this layer is also responsible for all of Earth's volcanic and seismic activity. (universetoday.com)
- Convection cells can form in any fluid, including the Earth's atmosphere (where they are called Hadley cells), boiling water, soup (where the cells can be identified by the particles they transport, such as grains of rice), the ocean, or the surface of the sun. (wikipedia.org)
- What are the steps of the convection cycle in Earth's atmosphere? (reference.com)
- Olson,P., Silver,P. G. & Carlson,R. W. The large scale structure of convection in the Earth's mantle. (nature.com)
- HS-ESS2-3 Develop a model based on evidence of Earth's interior to describe the cycling of matter by thermal convection. (flinnsci.com)
Mass transport by convection1
- In the sense that the flow can be reversed to go in the opposite direction, so can mass transport by convection. (comsol.se)
Roiling convection cells1
- Plasma: At any given time, the surface of the sun has thousands of roiling convection cells as large as the entire earth. (exploratorium.edu)
Thermal13
- When the cause of the convection is unspecified, convection due to the effects of thermal expansion and buoyancy can be assumed. (wikipedia.org)
- Thermal convection. (wikipedia.org)
- Convection usually requires a gravitational field, but in microgravity experiments, thermal convection has been observed without gravitational effects. (wikipedia.org)
- A.Gaponenko and V. E. Zakhvataev,Nonboussinesq Thermal Convection in Microgravity under Nonuniform Heating Albert Irvin Frye (1913). (wikipedia.org)
- Pattern evolution during thermal convection in a mixture of two silicone oils, with viscosities 1cs and 100cs. (phys.org)
- Researchers from Tokyo Metropolitan University, have recently discovered unusual thermal convection in a uniform mixture of high- and low-viscosity liquids. (phys.org)
- Kobayashi and Kurita found that concentration fluctuations are enhanced by thermal convection when the two liquids have a large viscosity difference. (phys.org)
- When a fluid is heated from below, thermal convection is usually driven by a density difference. (phys.org)
- Kobayashi and Kurita found that immobile regions are transiently formed during thermal convection in well-mixed two component liquids with a large viscosity difference. (phys.org)
- The research group of Kazuya U. Kobayashi (PhD student) and Rei Kurita (Associate Professor) specializes in experimental studies of thermal convection. (phys.org)
- Prof. Kurita notes that "although this unusual phenomenon is only observed in thermal convection , the viscosity difference between components should play an important role in the dynamics of fluid mixtures, such as in mantle convection , mixing processes, etc. (phys.org)
- Kazuya U. Kobayashi et al, Ubiquitous transient stagnant domain formation during thermal convection in a well-mixed two component fluid with large viscosity difference, Scientific Reports (2017). (phys.org)
- As active cooling becomes increasingly important for today s high-speed memory solutions, OCZ developed the XTC Cooler for effective heat management of OCZ s proprietary XTC (Xtreme Thermal Convection) modules. (hardwarecanucks.com)
Conduction7
- Note that the term convection in heat transfer usually refers to the combination of heat transfer by conduction and advection, where advection refers to heat transfer due to bulk fluid motion. (comsol.se)
- Heat Transfer- conduction, convection, and radiation practice that involves reading comprehension and application! (teacherspayteachers.com)
- Students will complete one mini lab on each type of heat transfer (radiation, convection and conduction). (teacherspayteachers.com)
- Simplified flow chart to help students identify the three types of heat transfer: radiation, convection and conduction. (teacherspayteachers.com)
- The concepts of conduction, convection, and radiation are covered as well as the laws of conservation of energy and matter. (teacherspayteachers.com)
- This web-quest includes two video clip links and a link to a student friendly website to obtain information on winds, air pressure, radiation, convection, and conduction. (teacherspayteachers.com)
- I figure I should take 2 things into account, the convection and the conduction. (physicsforums.com)
Moist1
- Moist convection leads to thunderstorm development, which is often responsible for severe weather throughout the world. (wikipedia.org)
Granular4
- Granular convection is a phenomenon where granular material subjected to shaking or vibration will exhibit circulation patterns similar to types of fluid convection . (wikipedia.org)
- Under experimental conditions, granular convection of variously sized particles has been observed forming convection cells similar to fluid motion. (wikipedia.org)
- [3] [4] The convection of granular flows is becoming a well-understood phenomenon. (wikipedia.org)
- According to Heinrich Jaeger , "[this] explanation for size separation might work in situations in which there is no granular convection, for example for containers with completely frictionless side walls or deep below the surface of tall containers (where convection is strongly suppressed). (wikipedia.org)
Occurs6
- Its counterpart in the ocean (deep convection downward in the water column) only occurs at a few locations. (wikipedia.org)
- Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). (wikipedia.org)
- Convection occurs on a large scale in atmospheres, oceans, planetary mantles, and it provides the mechanism of heat transfer for a large fraction of the outermost interiors of our sun and all stars. (wikipedia.org)
- In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. (wikipedia.org)
- An international team of physicists, led by Physics Professor Guenter Ahlers, is working to ascertain more about the fundamental physical laws that are at work in a process known as convection, which occurs in a boiling pot of water as well as in the turbulent movement of the liquid outer core of the Earth. (ucsb.edu)
- Fluid convection (bulk flow) which occurs in the brain interstitial fluid under normal conditions ( 1 ) with vasogenic edema ( 2 ) and after infusion of solutions directly into brain parenchyma ( 3 ), is a promising technique for distribution of solutions into brain tissue. (aacrjournals.org)
Type of convection1
- This particular type of convection, where a horizontal layer of fluid is heated from below, is known as Rayleigh-Bénard convection. (wikipedia.org)
Extent of convection3
- Previous convection-based clinical trials showed significant diversity in the extent of convection among patients and drugs. (aacrjournals.org)
- After accounting for these variables, initial clinical experience shows that there is significant variability in the extent of convection among patients, as well as in differential tumor response to the therapeutic drugs. (aacrjournals.org)
- Therefore, increasing tumor response to convection-based therapies in a reliable/reproducible manner is essential, as well as real-time, noninvasive monitoring of the extent of convection and its early effects on the tissue. (aacrjournals.org)
True convection1
- Achieve unrivaled performance with the only system that delivers top-down true convection for consistent results on special-occasion favorites, such as roasts, chicken, turkey and more. (bestbuy.com)
Oceanic convection1
- [2] While less dynamically important than in the atmosphere, such oceanic convection is responsible for the worldwide existence of cold water in the lowest layers of the ocean. (wikipedia.org)
Physics1
- Thermochemical convection can thus reconcile the survival of geochemically distinct reservoirs with the small amplitude of present-day density heterogeneities inferred from seismology and mineral physics. (nature.com)
Mantle9
- To understand the forms that convection might take in such a mantle, I have conducted laboratory experiments on thermochemical convection in a fluid with stratified density and viscosity. (nature.com)
- Moreover, quantitative scaling laws derived from the experiments show that the mantle might have evolved from strictly stratified convection 4 Gyr ago to doming today. (nature.com)
- Morgan,W. J. Plate motions and deep mantle convection. (nature.com)
- Such mixtures are ubiquitously observed in nature, daily life, and manufacturing processes e.g. mantle convection, syrup, polymer products. (phys.org)
- This suggests that the viscosity difference plays an important role in non-equilibrium phenomenon in fluid mixtures, such as in the dynamics of convection in the mantle, mixing processes in polymer solutions, etc. (phys.org)
- The UNAVCO IDV is an excellent way to show and explore mantle convection models, in map or globe views, with time animation. (unavco.org)
- provided the mantle convection model output used in these examples, in 2006. (unavco.org)
- Albarède, F. , and R. D. van derHilst ( 1999 ), New mantle convection model may reconcile conflicting evidence , Eos Trans. (wiley.com)
- Albarède, F. , Time-dependent models of U-Th-He and K-Ar evolution and the layering of mantle convection , Chem. (wiley.com)
Deep convection1
- The SPM is implemented in a single-column model and compared with a large-eddy simulation of deep convection. (osti.gov)
Diffusion Problems5
- An adaptive multigrid strategy for convection diffusion problems. (uva.nl)
- For the solution of convection-diffusion problems we present a multilevel self-adaptive mesh-refinement algorithm to resolve locally strong varying behavior, like boundary and interior layers. (uva.nl)
- An optimal-order error estimate for a family of characteristic-mixed methods to transient convection-diffusion problems. (aimsciences.org)
- In this paper we propose and analyze stable variational formulations for convection diffusion problems starting from concepts introduced by Sangalli. (numdam.org)
- In this paper, we extend the method to convection-diffusion problems. (diva-portal.org)
Bake2
- Convection microwaves combine conventional microwave technology with an extra heating element and fan, allowing you to bake, roast and crisp food along with general quick reheating. (whirlpool.com)
- In a convection microwave, an extra heating element and fan circulate hot air around the cavity, letting you bake and roast food with home-cooked results. (whirlpool.com)
Heat transfer1
- Convection is the only one of the three heat transfer methods to involve the movement of matter. (reference.com)
Buoyancy2
- Rayleigh-Bénard convection (RBC) is the buoyancy-driven flow of a fluid heated from below and cooled from above. (mpg.de)
- Buoyancy and convection play no roll in the atmosphere. (thunderbolts.info)
Viscosity1
- It was found that low-viscosity infusates tend to backflow along the catheter track, whereas high-viscosity infusates tend to form efficient convection. (aacrjournals.org)
Cavity1
- This convection microwave oven's stainless steel cavity allows better reflection and uniformity of heating inside the cavity so food cooks better. (flipkart.com)
Velocity3
- We understand convection as mass transport due to the average velocity of all molecules, and diffusion as mass transport due to the instantaneously varying, randomized velocity of individual molecules, compared to the average velocity of the fluid as a whole. (comsol.se)
- This simple equation illuminates the consequence of convection: The mass of a species, distributed in space according to some concentration profile, is displaced according to the velocity, u . (comsol.se)
- For the laminar case, since convection transports mass only tangent to the velocity - that is, along streamlines - it cannot lead to mass transfer between adjacent layers of fluid. (comsol.se)
Atmosphere2
- Hauke Schulz and Prof. Bjorn Stevens, researchers in the department "The Atmosphere in the Earth System" at the Max Planck Institute for Meteorology (MPI-M), show in their new study in the Journal of Atmospheric Science the first observational evidence of mechanisms, previously hypothesized based on modelling studies, leading to the self-aggregation of convection. (mpg.de)
- Gases: The atmosphere and weather are affected by convection. (exploratorium.edu)
Adaptive1
- 8] W. Dahmen , S. Müller and T. Schlinkmann , On an adaptive multigrid solver for convection-dominated problems , SIAM J. Sci. (numdam.org)
Oven's1
- Industrial Microwave Convection Oven's scope of application: rotary drum dryers are widely used in food, feed, chemical, pharmaceutical, mining and other industries. (ipras.org)
Cells13
- It consists of two primary convection cells, the Hadley cell and the polar vortex, with the Hadley cell experiencing stronger convection due to the release of latent heat energy by condensation of water vapor at higher altitudes during cloud formation. (wikipedia.org)
- The size of convection cells is largely determined by the fluid's properties. (wikipedia.org)
- Convection cells can even occur when the heating of a fluid is uniform. (wikipedia.org)
- Play media The Sun's photosphere is composed of convection cells called granules, which are rising columns of superheated (5,800 °C) plasma averaging about 1,000 kilometres in diameter. (wikipedia.org)
- It's cool to be dense-just watch these convection cells. (exploratorium.edu)
- Visualize the fluid motion of convection cells. (exploratorium.edu)
- When the pan is placed on the hot plate, convection cells rise through the liquid directly above the heating element (or coins, if you used them). (exploratorium.edu)
- This causes the convection cells to widen and become extremely well defined. (exploratorium.edu)
- These dark lines show where the fluid of one or more convection cells is diving downward. (exploratorium.edu)
- Liquids: Convection cells occur in liquids great and small, from a cup of coffee to the oceans. (exploratorium.edu)
- This continuous cycle of expansion and contraction causes convection cells. (reference.com)
- A state of bacterial magneto-convection results wherein bacterial plumes emerge spontaneously perpendicular to the wall and develop into stable and reproducible self-sustained flow convection cells. (cam.ac.uk)
- long lived convection cells. (wattsupwiththat.com)
Airflow2
- Heat emitted by electronic components within the device housing creates airflow by convection, which causes air to be drawn into the stand through the stand air intake openings and communicated into the device air intake openings. (freepatentsonline.com)
- With a gentle airflow, our gravity convection incubators allow a heat-generated convection to move the air vertically through the chamber to heat samples. (spectrumchemical.com)
Density3
- The broader sense is in fluid mechanics, where convection refers to the motion of fluid driven by density (or other property) difference. (wikipedia.org)
- For intermediate density contrasts, a 'doming' regime of convection is observed, in which hot domes oscillate vertically through the whole layer while thin tubular plumes rise from their upper surfaces. (nature.com)
- We consider a nonlocal convection-diffusion equation $u_t=J*u-u-uu_x,$ where $J$ is a probability density. (impan.pl)
Bulk fluid1
- If there is bulk fluid motion, convection will also contribute to the flux of chemical species. (comsol.se)
Microwaves1
- We have a range of microwaves from some of the best brand names in the industry, whether you are looking for a Panasonic microwave, a Westinghouse microwave, Samsung microwave, a Bosch microwave or a Sharp convection microwave. (harveynorman.com.au)
Cooking2
- A combination machine like the convection microwave has expanded cooking capabilities, and anyone who ponies up for one of these puppies should know whether or not something like foil can be used inside it. (answers.com)
- Roasting, baking, cooking and crisping are all possible when you upgrade to a convection microwave. (whirlpool.com)
Plumes1
- In the numerical simulation below, the fluid is at rest in the bulk until convection rolls appear which in turn are destabilzed by finger-like structures that detach from the boundary layers, called plumes. (mpg.de)
Analytical Solutions1
- In the present work we derive analytical solutions for the problem of convection, diffusion and chemical reaction in wall-flow monoliths. (sae.org)
Motions2
- According to the University of Illinois at Urbana-Champaign, convection refers to the distribution of heat through vertical motions of air. (reference.com)
- Convection motions within the Sun transport heat from its interior to its surface. (wattsupwiththat.com)
Motion3
- Eventually these formations trigger the breakdown of the convection rolls and the motion becomes chaotic/turbulent. (mpg.de)
- Convection works by transferring heat from a hot substance to a cooler one through the motion of one of the substances. (reference.com)
- Convection is mass transfer due to the bulk motion of a fluid. (comsol.se)
Occur1
- On astronomical scales, convection of gas and dust is thought to occur in the accretion disks of black holes, at speeds which may closely approach that of light. (wikipedia.org)
Flows1
- Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place. (wikipedia.org)
Clouds1
- A convection cell is most notable in the formation of clouds with its release and transportation of energy. (wikipedia.org)
Equation4
- It is demonstrated that in the steady-state case without account of convection, the general analytical solution can be found without any constraints on the equation parameters and it is expressed in terms of the Weierstrass elliptic function. (springer.com)
- Mehdi Dehghan, "On the numerical solution of the one-dimensional convection-diffusion equation," Mathematical Problems in Engineering , vol. 2005, no. 1, pp. 61-74, 2005. (hindawi.com)
- In this paper, we answer the question under which conditions the porous-medium equation with convection and with periodic boundary conditions possesses gradient-type Lyapunov functionals (first-order entropies). (aimsciences.org)
- This is the convection equation , a time-dependent, first-order partial differential equation. (comsol.se)
Sun's1
- Plasma is ionized and massy particles, convection of which is the Sun's major heat transport mechanism. (wattsupwiththat.com)
Catheter1
- Convection is known to depend on variables such as catheter size, flow rate, tissue consistency, catheter localization, infusate concentration, and molecular weight ( 12 , 13 ). (aacrjournals.org)
Incubators1
- Check out Spectrum Chemical's wide selection of gravity convection incubators ideal for routine general cell culture protocols that call for open plates or open containers. (spectrumchemical.com)
Gravitational1
- The convection may be due to gravitational, electromagnetic or fictitious body forces. (wikipedia.org)
Movement of a heated2
- Convection , process by which heat is transferred by movement of a heated fluid such as air or water. (britannica.com)
- Convection is the transfer of heat by the movement of a heated fluid. (reference.com)
BINDER1
- The BINDER incubator of the BF Avantgarde.Line series with forced convection is suitable for all gentle incubation applications, particularly under a full load and large batch throughputs. (binder-world.com)
Atmospheric3
- There are a few general archetypes of atmospheric instability that are used to explain convection (or lack thereof). (wikipedia.org)
- Atmospheric convection is called deep when it extends from near the surface to above the 500 hPa level, generally stopping at the tropopause at around 200 hPa . (wikipedia.org)
- Some more localized phenomena than global atmospheric movement are also due to convection, including wind and some of the hydrologic cycle. (wikipedia.org)