The evaporation rate and internal convective flows of a sessile droplet with a pinned contact line were formulated and investigated numerically. We developed and analyzed a unified numerical model that includes the effects of temperature, droplet volume, and contact angle on evaporation rate and internal flows. The temperature gradient on the air/liquid interface causes an internal flow due to Marangoni stress, which provides good convective mixing within the droplet, depending upon Marangoni number. As the droplet volume decreases, the thermal gradient becomes smaller and the Marangoni flow becomes negligible. Simultaneously, as the droplet height decreases, evaporation-induced flow creates a large jet-like flow radially toward the contact line. For a droplet containing suspended particles, this jet-like convective flow carries particles toward the contact line and deposits them on the surface, forming the so-called "coffee ring stain". In addition, we reported a simple polynomial correlation ...
Convection-enhanced delivery permits the direct homogeneous delivery of small- and large-molecular-weight putative therapeutics to the nervous system in a manner that bypasses the blood-nervous system barrier. The development of co-infused surrogate imaging tracers (for computed tomography and MRI) allows for the real-time, noninvasive monitoring of infusate distribution during convective delivery. Real-time image monitoring of convective distribution of therapeutic agents insures that targeted structures/nervous system regions are adequately perfused, enhances safety, informs efficacy (or lack thereof) of putative agents, and provides critical information regarding the properties of convection-enhanced delivery in normal and various pathologic tissue states ...
Define Convection, Rotation and Planetary Transits. Convection, Rotation and Planetary Transits synonyms, Convection, Rotation and Planetary Transits pronunciation, Convection, Rotation and Planetary Transits translation, English dictionary definition of Convection, Rotation and Planetary Transits. Jean Baptiste Camille 1796-1875. French artist of the Barbizon school whose landscape paintings influenced the impressionists. n Jean Baptiste Camille ....
Liquid lead bismuth eutectic (LBE) is very corrosive to steels. To mitigate structural corrosion of LBE systems, active oxygen control technique is developed. To enhance the speed of oxygen transport in liquid LBE, natural convection has been proposed. This paper numerically analyzes the oxygen transport in a natural convection induced LBE enclosure. Different temperature boundary conditions are added to the container. Both laminar and turbulent LBE flows which are distinguished by strength of flow measured are analyzed. Three laminar cases: (a) heated from the bottom and cooled from the top of the container; (b) heated from the sidewalls and cooled from the top of the container; (c) one sidewall heated and the opposite wall cooled, and one fully turbulent case with one sidewall heated and the opposite sidewall cooled are chosen. Oxidization in near wall areas and formation of oxide layers on container surfaces are considered. In each case, the characteristic velocity and oxygen diffusion time are
Article Entropy generation for unsteady natural convection and thermal radiation inside a porous enclosure. Entropy generation problem for unsteady natural convection and thermal radiation in a vertical porous enclosure, submitted to a uniform hot wa...
A method and system, together with corresponding apparatus and components, and corresponding kits, for use in performing topical wound therapy by using topical negative pressure (TNP) in combination with one or more hollow fiber catheters. In one embodiment, the method provides hollow fiber catheters for the removal of fluid or fluid components from the wound area by ultrafiltration. In another embodiment the hollow fiber catheters are connected to an infusion pump and used to deliver therapeutic fluids to the wound area. In yet another embodiment, a first set of hollow fiber catheters is connected to a vacuum pump and a second set is connected to an infusion pump to simultaneously remove excess tissue fluid and deliver therapeutic fluid to the wound site.
TY - JOUR. T1 - The effect of temperature-dependent solubility on the onset of thermosolutal convection in a horizontal porous layer. AU - Pritchard, David. AU - Richardson, Chris N.. PY - 2007/1/31. Y1 - 2007/1/31. N2 - We consider the onset of thermosolutal (double-diffusive) convection of a binary fluid in a horizontal porous layer subject to fixed temperatures and chemical equilibrium on the bounding surfaces, in the case when the solubility of the dissolved component depends on temperature. We use a linear stability analysis to investigate how the dissolution or precipitation of this component affects the onset of convection and the selection of an unstable wavenumber; we extend this analysis using a Galerkin method to predict the structure of the initial bifurcation and compare our analytical results with numerical integration of the full nonlinear equations. We find that the reactive term may be stabilizing or destabilizing, with subtle effects particularly when the thermal gradient is ...
An area of convection has persisted near 12.9S 161.1E, approximately 640 nautical miles north-northwest of Noumea, New Caledonia.. The main image here shows the area of convection 36 hours ago, when it was located farther east. The image of the globe shows the systems current location.. Animated METSAT imagery depicts a developing low-level circulation center (LLCC) with flaring deep convection located primarily over the western periphery of the disturbance.. An ASCAT pass shows 10 to 15 knot winds near the center of the tight, but elongated, LLCC.. The system is located in a region of strong, vertical wind which is limiting development at this time.. ...
An analysis is made of natural convection mass transfer in a ternary gas mixture adjacent to a vertical plate. The main feature of the analysis is the proper mathematical description of the buoyancy force and of the boundary conditions. With regard to the latter, account is taken of the selective impermeability of the plate to certain components of the mixture. The governing boundary layer equations are shown to admit a similarity solution, and a numerical scheme for solving the similarity equations and boundary conditions is outlined. The general formulation is specialized to the case of sublimation from a solid, vertically oriented naphthalene plate situated in a humid air environment. Solutions were obtained for temperature levels corresponding to those encountered in practice and for relative humidities of water vapor between zero and one. It was found that the mass transfer results were unaffected by the presence of humidity, and this finding gives license to the utilization of the ...
Steady natural convection heat transfer has been studied in porous wall, solar collector systems. The boundary conditions were: two isothermal walls at different temperatures, two horizontal bounding adiabatic walls, and either uniform or nonuniform heat generating porous layer without vents. The aspect ratio A was from 0.5 to 1.4. The Rayleigh number varied from 103 to 108 . The Darcy number was from 10−8 to 10−2 but the detailed studies were carried out only for 10−4 , an optimum value. The results are presented in terms of thermal parameters (θ, θmax , Nu) as a function of Ra and other nondimensional parameters (A=H/L, B=1/L, F=d/L, kr ). The isotherms and streamlines within the system are also produced. The overall results indicate that geometrical parameters are the most important parameters affecting the system performance.. ...
Provides a single-source resource all cylinder heat transfer correlations Presents an exhaustive treatment of natural convection from cylinders including
The composition field in front of a growing lamellar eutectic was determined numerically, both with and without a lateral convective flow. By minimization of the interfacial undercooling it was found...
Convection, process by which heat is transferred by movement of a heated fluid such as air or water. 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. Circulation caused by this effect
Convective systems dominate the vertical transport of aerosols and trace gases. The most recent in situ aerosol measurements presented here show that the concentrations of primary aerosols including sea salt and black carbon drop by factors of 10 to 10,000 from the surface to the upper troposphere. In this study we show that the default convective transport scheme in the National Science Foundation/Department of Energy Community Earth System Model results in a high bias of 10-1,000 times the measured aerosol mass for black carbon and sea salt in the middle and upper troposphere. A modified transport scheme, which considers aerosol activation from entrained air above the cloud base and aerosol‐cloud interaction associated with convection, dramatically improves model agreement with in situ measurements suggesting that deep convection can efficiently remove primary aerosols. We suggest that models that fail to consider secondary activation may overestimate black carbons radiative forcing by a ...
A coupled mechanism for molecular aggregation in a thin water solution film by laser-tweezers is suggested based on (i) simulation of light intensity distribution and (ii) order of magnitude analysis of heat and mass transport induced by Marangoni convection. The analysis suggests that the laser induced temperature distribution develops within 1 ms and Marangoni convection flow commences within 0.01-1 s, which increases by 1-2 orders of magnitude the mass transfer of dissolved molecules into the laser focus where they are trapped and aggregate by attractive van der Waals forces. This mechanism, considered for the particular case of polymer assembly, suggests that it can also be successfully applied for assembling other types of clusters and molecular aggregates from solutions.. ©2008 Optical Society of America. Full Article , PDF Article ...
Analytical Solution Of The Diffusion - Convection Equation Over A Finite Domain. Analytical Solution Of The Diffusion - Convection Equation Over A Finite Domain.. ...
The evolution of a star through the helium flash depends upon uncertain aspects of convection theory. Observations place some constraints on the theory of convection in stellar cores.
Binding of targetted biomolecules, pathogens or analytes on a reactive surface is commonly used for biodiagnostic systems. However the process is slow and inefficient if one relies only on molecular diffusion to transfer the analytes to the immobilized ligand. A micropump based on a Marangoni convection in a droplet geometry has been designed in order to enhance the kinetics of binding. The droplet is suspended to a heated rod and cooled at its bottom, resulting in a gradient of temperature on the liquid-air interface that drives a Marangoni convection inside the droplet. This type of convection has been verified by an experimental set up. We have then developped a numerical model for the calculation of the kinetics of binding: first, a calculation of the Maragoni flow is performed assuming a steady state convection, second, we solve a coupled system for the the concentration of analytes inside the droplet and the adsorption at the wall. The model shows the efficiency of the convection on the kinectics
Experimental and Numerical Analyses of Natural Convection flow in a partially heated Vertical Annulus, Numerical Heat Transfer- Part A, Taylor & Francis, 2017, ISSN: 0891-6152 , Vol. 30, No.1, pp. 25-45.. Experimental Studies on Natural Convection of Water in a Closed Loop Vertical Annulus, Experimental Heat Transfer, Taylor & Francis, 2017, ISSN: 0891-6152 , Vol. 30, No.1 pp. 25-45.. Experimental Study of Boiling Incipience in a Closed Loop Vertical Annular Thermo-siphon, Applied Thermal Engineering, Elsevier Ltd. 2010 , Vol. 30, Issues 11-12 pp.1333-1340.. Heat Transfer Studies during Natural Convection Boiling in an Internally Heated Annulus, Int. J. Heat and Mass Transfer, Elsevier Science Ltd. Pergamon, 2003,Vol. 46, No.6, pp.1085-1095.. Economic Analysis of Two Stage Dual-Fluid Absorption Cycle for Optimizing Generator Temperatures. Energy Convers. & Mmgt. Elsevier Science Ltd. 2001,Vol. 42, pp.407-437.. Performance and Economic study of the combined Absorption/ Compression Heat Pump, ...
Everyone knows that hot fluid rises and cold fluid sinks. These buoyancy driven flows, known as thermal convection, are physical phenomena of great importance for engineering applications and throughout the geophysical and astrophysical sciences. Heat transfer by natural convection is a basic consideration for insulation, ventilation, and climate control in buildings, in automotive engineering and for the thermal management of electronic devices and systems. Thermal convection occurs naturally in the earths atmosphere and oceans and plays a fundamental role in the global heat transfer processes determining the weather and controlling the climate. On geological time scales, convection in the earths mantle is the driving force behind continental drift. On the largest scales, convective heat transport in stars is a primary factor in the balance between ongoing thermonuclear explosions in the core and gravitational attraction that determines their structure.. Despite its ubiquity in everyday life, ...
Thirty-one patients with a mean age of 7.6 years (range 3.2-18 years) underwent 39 catheter insertions for CED between 2012 and 2017. Thirty catheter insertions had tractography data available for analysis. The mean trajectory length was 105.5 mm (range 92.7-121.6 mm). The mean number of intersections of CST by catheter was 2.2 (range 0-3) and the mean intersecting length was 18.9 mm (range 0-44.2 mm). The first 9 infusions in the highest dose level (range 3.84-4.54 ml infusate) were analyzed for Vd overlap with CST. In this group, the mean age was 7.6 years (range 5.8-10.3 years), the mean trajectory length was 109.5 mm (range 102.6-122.3 mm), and the mean overlap between Vd and CST was 5.5 cm3. For catheter placement-related adverse events, 1 patient (3%) had worsening of a contralateral facial nerve palsy following the procedure with two CST intersections, an intersecting distance of 31.7 mm, and an overlap between Vd and CST of 3.64 cm3. For infusion-related adverse events, transient ...
Here we review the improvements that have been made to CED devices over recent years and current state of the art for chronic infusion systems.
A Phase II, multi-center, open-label, single-arm study in up to 42 subjects with first recurrence or progression of GBM at up to 12 sites in Australia, Europe, Israel, and the United States. Subjects will receive intratumoral infusion of PRX321 administered via convection-enhanced delivery (CED) at a concentration of 1.5 μg/mL and a total volume of 60 mL over 2 to 7 days.. Primary Objective:. To evaluate the efficacy (expressed as overall survival at 6 months [OS-6]) of intratumoral infusion of PRX321 in subjects with first recurrence or progression of glioblastoma multiforme (GBM).. Secondary Objectives:. To assess the safety of intratumoral infusion with PRX321 in subjects with recurrent or progressive GBM.. To evaluate objective response rate (ORR), duration of response (DR), overall survival (OS), and progression-free survival (PFS).. Tertiary Objective:. To evaluate the relationship of observed infusate distribution with clinical and radiological responses. ...
Conduction, convection, and radiation are all forms of heat transfer, but they rely on different physical interactions to transfer heat. Conduction occurs when heated solid matter transfers heat....
PAN Czytelnia Czasopism, Numerical simulation of forced convection of nanofluid around a circular cylinder - Archives of Thermodynamics
V. P. Trubitsyn and A. M. Bobrov Abstract Thermomechanical interaction between the mantle and continents strongly affects mantle convection patterns. We present a numerical study of this interaction. Numerical models of mantle convection with free-floating rigid continents must include boundary conditions at mantle-continent interfaces. We state these conditions using solutions at successive time steps $\Delta t$. First, with fixed positions of continents, thermal convection is calculated for the whole region excluding the continents; then the instantaneous velocity $V$ of their displacement can be obtained. At the next time step mantle convection is calculated with the new positions of continents now shifted by the distance $V\Delta t$. No-slip conditions at the mantle-continent interface cannot be used, because $V$ equals zero in that case. We suggest boundary conditions at mantle-continent interfaces where velocities of the continents are accepted to be equal to the mean velocities of the ...
Despite the improvements in the parameterizations of physical processes and higher grid spacings of numerical weather prediction (NWP) models over the past decades, quantitative precipitation forecasting still remains a challenge for state-of-the-art numerical models. In particular, the forecast of deep moist convection in situations with weak synoptic forcing over both flat and orographically structured terrain is still inadequate for many applications. With prevailing weak synoptic-scale forcing, land-atmosphere interactions are assumed to be decisive for cloud formation and subsequent convective precipitation. Surface heterogeneities ranging from large scales (100 km) to kilometric scales can cause atmospheric circulations which themselves modify the boundary layer structure and cloud formation. For example, soil moisture influences heat and moisture fluxes into the planetary boundary layer and uncertainties in the initial state can introduce large forecast errors. Furthermore, the feedback ...
Convection motions within the Sun transport heat from its interior to its surface. The hot regions are seen as granular (∼1000 kilometers across) and supergranular (∼30,000 kilometers across) cells in the Sun. Using data from the Helioseismic Magnetic Imager on the Solar Dynamics Observatory, Hathaway et al. (p. 1217) found evidence for even larger cells that have long been predicted by theory but not unambiguously detected. The flows associated with these giant cells transport angular momentum toward the equator and are important for maintaining the Suns equatorial rotation.. Video follows: GO WITH THE FLOW Long-lasting plasma flows appear in red and blue in this animation, which portrays data from four solar rotations. Some flows persist for several months; these patterns are especially visible near the suns north pole. Scientists think these flows keep the suns equator rotating faster than its poles.. ...
The proposition that a high rate of evapotranspiration from forested regions is a prime mover of major air mass convection has remained contentious. Meesters et al. (2009) rejected the BPT on the grounds that the ascending air motions induced by the evaporative/condensation force would rapidly restore hydrostatic equilibrium and thereby become extinguished. In reply Makarieva et al. (2009) pointed out that condensation removed water vapour molecules from the gas phase and reduced the weight of the air column. That removal must disturb hydrostatic equilibrium and make air circulate under the action of the evaporation/condensation force (Makarieva, 2009). The mass of an air column is equal to the number of air molecules in the column multiplied by their molecular masses. When the number of air molecules in the column is preserved, its weight remains unchanged and independent of density. Hence, heating of the air column does not change its weight. In contrast, condensation changes the number of gas ...
ZCZC MIATCDAT2 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION FRED DISCUSSION NUMBER 21 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL072009 500 PM AST SAT SEP 12 2009 OTHER THAN A SHORT-LIVED PUFF OF DEEP CONVECTION WELL-REMOVED FROM THE CIRCULATION CENTER...FRED IS NOW A SWIRL OF LOW CLOUDS DEVOID OF DEEP CONVECTION. IN FACT...THERE HAS BEEN NO CENTRAL CONVECTION ASSOCIATED WITH FRED SINCE ABOUT 0000 UTC....AND FRED IS NO LONGER CLASSIFIABLE USING THE DVORAK TECHNIQUE. THE LACK OF DEEP CONVECTION ALSO MEANS THAT FRED IS NO LONGER A TROPICAL CYCLONE... AND IS NOW DECLARED A REMNANT LOW. THE INITIAL INTENSITY IS LOWERED TO 30 KT...BASED UPON AN EARLIER QUIKSCAT PASS AND THE ASSUMPTION THAT THERE HAS BEEN ADDITIONAL WEAKENING SINCE THAT TIME. WHAT REMAINS OF FRED SHOULD BEGIN MOVING NORTHWESTWARD TO WEST- NORTHWESTWARD WITH AN INCREASE IN FORWARD SPEED OVER THE NEXT 12 TO 24 HOURS...AS A LOW- TO MID-LEVEL RIDGE BUILDS TO ITS NORTH. SEVERAL GLOBAL MODELS STILL MAINTAIN THE REMNANTS OF FRED DURING THE ...
Charney and Eliassen (1964) argued in essence that the depth of the free tropospheric secondary circulation associated with cross-isobaric frictional flow is comparable to the depth of the troposphere. As noted in section 1, the steady-state approximation would be valid if this were true, and the vertical motion at the top of the boundary layer could be said to be caused by the action of surface friction. However, as we have shown, typical values of atmospheric stratification result in a far shallower secondary circulation in response to surface friction. Under these circumstances, the time tendency of the wind along the isobars cannot be neglected for a flow of any reasonable horizontal scale (say , 1000 km) in the tropics. For horizontal scales of order 100 km or less, the vertical scale of the secondary circulation is typically much smaller than the thickness of the layer over which surface friction is deposited, especially when there is widespread shallow, moist convection such as occurs in ...
Article Entropy generation due to forced convection fluid flow about a solid sphere. The problem of entropy generation for laminar fluid flow around a solid sphere subjected to uniform heat flux is investigated numerically using a finite-difference t...
n this work, a simple numerical model of the evaporation process of a single droplet of various fuels, e.g., n-alkanes (n-decane, n-hexane, and n-heptane) and kerosene is evaluated with various correlations at standard pressure (0.1 MPa) and various uniform temperature fields. The effect of natural, forced or combined convection is explored using an effective Reynolds number (Reeff). Studies are performed for n-alkanes and kerosene droplets and have been compared with the empirical data available in the literature for the temporal variation of droplet diameter, droplet surface temperature, and average evaporation rate constants at various temperatures under free-stream and quiescent conditions. A good match is observed for a particular property rule (Eq. 10), with different convective correlations, depending on the convective conditions present.. ...
With this hands-on kit students perform investigations to learn how air masses are formed and how air moves in response to changes in temperature. These investigations help students gain an understanding of the terms air mass, convection current, and front.
The adjoint method for data assimilation is a gradient-based inversion technique which is especially useful for inverting nonlinear dynamic systems. Recently, its application for simulating geophysical problems has been proved promising. In this paper, we try to introduce the adjoint method in a systematic way, from the theoretical basis to its practical implementation in numerical models of mantle convection, with several examples to help the understanding. The adjoint operator of a temporally evolving system can be derived based on the perturbation theory, where a mismatch in the model output against observation is attributed to an error in the input, with their relation approximated as a first-order derivative (gradient) of the least-squared mismatch with respect to the input. For a nonlinear system, iterative processing is inevitable; the efficiency and convergence rate depend on the amount of a-priori information about the input (e.g. the initial condition). Seismic tomography, which ...
Heat Transfer- conduction, convection, and radiation practice that involves reading comprehension and application! Many students these days have a terribly difficult time comprehending nonfiction & informational text - textbooks, websites, articles etc.
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Santa Clara CA [September 5 2019] Bel Power Solutions a Bel group company (NASDAQ: BELFA and BELFB) and premier global manufacturer of power management devices today announced the ACC600 Series and MCC600 Series of convection cooled...
Turbofan® Convection Oven, elec., (2) 1/2 size sheet pan capacity, mechanical thermostat range 150 - 525°F, on/off switch, 60 minute timer, s/s top & sides, pull-down twin pane glass door, porcelain interior, 1.6kw, 5-15P cordset.. Interior oven dimensions: 18 1/2 W x 15 1/8 D x 10 5/8 H. $1225 plus shipping. ...
Oven vs Convection Oven An oven is a chamber or an enclosed compartment that is thermally insulated for heating, baking, or drying substances. Ovens are
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Abstract The influence of the melt flow on the solidification structure is bilateral. The flow plays an important role in the solidification pattern, viathe heat transfer, grain distribution, and...
Apparatus and methods are described for removing contaminants from an article using a supercritical or near supercritical solvent fluid held at substantially constant pressure in a pressure vessel. The article to be cleaned is first contacted with a solvent fluid in which the contaminant is soluble at a first supercritical or near-supercritical temperature. The
JS Research, S Korea General Laboratory application Max. 250℃, ±1.0 ℃ accuracy, ±2.0 ℃ uniformity. Digital PID Controller enables 0.1℃ resolution. Equipped with wait-off timer, alarm, auto-tuning and in built temperature calibration function. Modern Design Seamless round cornered edge of chamber prevents leakage and easy to clean. Perfect Safety Durable non-contact type switch and relay cut-off heater to protect hot air rush to outside when door open. Dual over-temperature protection safety and electrical leakage breaker. ...
Hello, I have setup and ran my fluent problem. It seems to not want to converge. There is a circular heater rod in the middle of a cylinder of fluid.
Thermal evolution of cooling magma chambers. E. A. Gorbyliova and V. P. Trubitsyn. Abstract. We calculate the variations of temperature fields in magma chambers and the surrounding material. In a suggested two-dimensional model, a viscous hot melt occupies a horizontal layer (a magma chamber) within a thicker solid layer. The geometry of this system and a temperature gradient in its solid part are initial conditions. Thermal convection starts in the melt and the magma chamber begins to cool, owing to heat loss through conduction in the surrounding solid medium. Melting occurs at liquid/solid interfaces, followed by solidification of the melt. We solve equations of thermal convection and heat conduction in liquid and solid regions, respectively. Numerical solutions are obtained by the single-region method where equations are applied to the whole region and the moving phase boundary results from calculations. The problem so formulated reduces to generalized equations of thermal convection with the ...
The temperature profile of the atmosphere is a result of an interaction between radiation and convection. Sunlight in the visible spectrum hits the ground and heats it. The ground then heats the air at the surface. If radiation were the only way to transfer heat from the ground to space, the greenhouse effect of gases in the atmosphere would keep the ground at roughly 333 K (60 °C; 140 °F), and the temperature would decay exponentially with height.[3]. However, when air is hot, it tends to expand, which lowers its density. Thus, hot air tends to rise and transfer heat upward. This is the process of convection. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as its surroundings. Air is a poor conductor of heat, so a parcel of air will rise and fall without exchanging heat. This is known as an adiabatic process, which has a characteristic pressure-temperature curve. As the pressure gets lower, the temperature decreases. The rate of decrease of ...
Glycerol is a sweet, highly viscous fluid thats very good at absorbing moisture from the ambient air. Thats why a drop of pure glycerol in laboratory conditions quickly develops convection cells - even when upside-down, as shown above. This is not the picture of Bénard-Marangoni convection were used to. Theres no temperature or density change involved; in fact, theres no buoyancy involved at all! This convection is driven entirely by surface tension. As glycerol at the surface absorbs moisture, its surface tension decreases. This generates flow from the center of a cell toward its exterior, where the surface tension is higher. Conservation of mass, also known as continuity, requires that fresh, undiluted glycerol get pulled up in the wake of this flow. It, too, absorbs moisture and the process continues. (Image credit: S. Shin et al., pdf). ...
ZCZC MIATCDEP1 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION OLIVIA DISCUSSION NUMBER 10 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP162006 800 PM PDT WED OCT 11 2006 AFTER BECOMING A LOW CLOUD SWIRL EARLIER TODAY... SOME INTERMITTENT BURSTS OF DEEP CONVECTION HAVE RE-FORMED NEAR THE CENTER. THIS CONVECTION CONTINUES TO BE SHEARED TO THE NORTHEAST BY STRONG UPPER-LEVEL WINDS. SINCE THE TROPICAL CYCLONE IS OVER MARGINALLY WARM WATERS... SOME ADDITIONAL DEEP CONVECTION MAY STILL OCCUR NEAR THE CENTER TONIGHT. THEREFORE ADVISORIES ARE BEING MAINTAINED AT THIS TIME. HOWEVER WE EXPECT OLIVIA TO SUCCUMB TO THE SHEAR... AND DISSIPATE AS A TROPICAL CYCLONE FAIRLY SOON. THE INITIAL MOTION IS 080/6... SLIGHTLY TO THE NORTH OF THE PREVIOUS TRACK. THE SHALLOW CIRCULATION IS EMBEDDED IN A LOW-LEVEL WESTERLY CURRENT WHICH WILL STEER THE SYSTEM EASTWARD UNTIL DISSIPATION OCCURS. THIS OFFICIAL FORECAST IS SIMILAR TO BUT SLIGHTLY NORTH OF THE PREVIOUS FORECAST TO ACCOUNT FOR THE INITIAL POSITION. FORECAST ...