• The dynamic compression data implies the change in electrical resistance is solely a function of the material deformation, i.e., the material exhibits constant electrical conductivity and is insensitive to the applied loads. (epj-conferences.org)
  • Optimization and Prediction of Thermal Conductivity and Electrical Conductivity of Vacuum Sintered Ti-6Al-4V-SiC(15 Wt. (manipal.edu)
  • A description of a technique to measure electrical conductivity of fluid systems for use in the oil industry was presented. (ltpep.com)
  • We believe [they] could have further scientific applications by helping us to find and understand limits of different properties such as viscosity and thermal conductivity relevant for high-temperature superconductivity, quark-gluon plasma and even black hole physics," says Queen Mary's Kostya Trachenko. (cosmosmagazine.com)
  • The need for experimental measurements - viscosity and thermal conductivity - on humid air was emphasized. (ltpep.com)
  • The system under consideration consists of 50 nm Al₂O₃ ceramic nanoparticles at various volume fractions ranging between 1.0 and 5.0% suspended in fluids of different density ratios, including water with homogeneous temperature distributions from 5 to 95 °C. The simulation results demonstrate the effectiveness of the technique, with predictions elucidating the role of Brownian motion, particle collision and DLVO forces, and their influence on the level of nanoparticle agglomeration. (whiterose.ac.uk)
  • According to the Tables 2, 3, dependences characterizing the change of thermal conductivity on density are obtained (Fig. 2, 3). (researchgate.net)
  • While the thermal resistances of many individual fiberglass samples have been measured, there is only one practical published table of thermal resistance vs. both temperature and density. (lbl.gov)
  • Quantitative predictions of reactive flow dynamics from large-scale simulations of Liquid Rocket Engines (LRE) appear to be model dependent. (sbir.gov)
  • In this work, we combine high-throughput molecular dynamics (MD) simulations and machine learning to explore polymers with relatively high thermal conductivity (>0.300 W/m-K) - a statistically important threshold as most neat polymers have thermal conductivity lower than this value under normal conditions. (lammps.org)
  • We first randomly select 365 polymers from the existing PoLyInfo database and calculate their thermal conductivity using MD simulations. (lammps.org)
  • Thermal conductivity data obey the modified Eucken's law in the temperature range of measurements. (scirp.org)
  • Andrey Pereverzev and Tommy Sewell, "Theoretical analysis of oscillatory terms in lattice heat-current time correlation functions and their contributions to thermal conductivity," Phys. (missouri.edu)
  • The scientists say they tested their theoretical prediction on a range of existing materials and even a theoretical one - solid metallic hydrogen, which may or may not exist at the centre of giant planets. (cosmosmagazine.com)
  • Nanoparticle packed beds (NPBs) have demonstrated the potential for thermal insulation, and further reducing thermal conductivity (k) requires a theoretical understanding of the thermal conduction in them. (arxiv.org)
  • Note: This paper is part of the Special Topic on Engineering and Understanding of Thermal Conduction in Materials. (aip.org)
  • Thermal conduction is a ubiquitous process that plays a critical role in many engineering applications, including power generation, energy harvesting and storage, thermal management of electronics, and materials processing. (aip.org)
  • Also, beyond the crystalline phase, thermal conduction in highly disordered and soft phases has received much attention. (aip.org)
  • Conduction is a particularly significant mechanism of heat loss in drowning/immersion accidents as thermal conductivity of water is up to 30 times that of air. (medscape.com)
  • Given the observed uncertainties in the MD-calculated TC, we have also constructed a Bayesian neural network to evaluate the epistemic and aleatoric prediction uncertainties, where a state-of-the-art approximate Bayesian inference algorithm is used for scalable training. (lammps.org)
  • The nano-aggregates formed are found to play a key role in the thermal behaviour of the nanofluid at various particle concentrations, with predictions in agreement with theoretical and experimental results obtained in similar studies. (whiterose.ac.uk)
  • The effective thermal conductivity of open- and closed-cell aluminium foams with stochastic pore morphologies has been determined by numerical, analytical and experimental methods. (edu.au)
  • Annual cooling energy loads and annual peak hourly cooling powers were calculated for the office building using both fixed and variable thermal conductivities, and using five different climates. (lbl.gov)
  • Active materials like the proposed variable thermal conductivity metamaterial enable new thermal designs and low-cost, low-power, passive thermal control. (asme.org)
  • The thermal performance of a CubeSat is evaluated with a variable thermal conductivity metamaterial located in the critical thermal path from the satellite to the radiator. (asme.org)
  • ABSTRACT: The thermal conductivity, thermal diffusivity and heat capacity per unit volume of dunite rocks taken from Chillas near Gilgit, Pakistan have been measured simultaneously using transient plane source technique. (scirp.org)
  • The transient short hot-wire method was used to measure the thermal conductivities over the temperature range 294-335 K at pressures ≤20 MPa. (oldcitypublishing.com)
  • Atomistic simulation methods combined with first-principles calculation make the prediction free from adjustable parameters. (aip.org)
  • The advances in both experimental and simulation methods have resulted in a better understanding of thermal transport processes and the rational engineering of materials with unprecedented thermal transport properties. (aip.org)
  • Polymers with a wide range of thermal conductivity values are selected for re-calculation under different simulation conditions, and those polymers found with thermal conductivity above 0.300 W/m-K are mostly calculated to maintain values above this threshold despite fluctuation in the exact values. (lammps.org)
  • Finding amorphous polymers with higher thermal conductivity is important, as they are ubiquitous in a wide range of applications where heat transfer is important. (lammps.org)
  • are added to a base fluid to enhance its thermal properties. (abdn.ac.uk)
  • Transport properties such as thermal conductivity are calculated from these atomic-level properties using classical and quantum physics. (wikipedia.org)
  • From the ensembles of simulated particles, static or dynamics thermal properties or scattering rates are derived. (wikipedia.org)
  • The temperature dependence of thermal transport properties is studied in the temperature range 83-303 K. Different relations for the estimation of thermal conductivity are also tested. (scirp.org)
  • NRPs are known to enhance the mechanical, electrical, thermal, and permeability properties and diffusion barrier attributes of their host polymers. (hindawi.com)
  • Prediction of transport properties. (google.pt)
  • Conductive polymer nanocomposites with enhanced electrical and thermal properties show promise as an alternative solution for electronic materials. (epj-conferences.org)
  • The electrical and thermal properties of the composite are measured and compared with predictions. (epj-conferences.org)
  • Finally, progress towards improving the polymer composite's mechanical, electrical, and thermal properties are discussed. (epj-conferences.org)
  • Salt bodies, which have high thermal conductivity and very low permeability, impact both thermal transfer and fluid flow, thereby helping to preserve the porosity and/or permeability of clastic sediments in certain cases. (searchanddiscovery.com)
  • Building energy models usually employ a constant, room-temperature-measured value for the thermal resistance of fiberglass roof insulation. (lbl.gov)
  • Polyester nonwoven fibrous material is widely used in construction and automobile industries for thermal insulation purposes. (mdpi.com)
  • Though the temperature dependence of the thermal resistance of porous materials like fiberglass has been extensively studied, it is difficult to theoretically predict the variation with temperature of a particular fiberglass blanket, from first principles. (lbl.gov)
  • The objective of this study was to determine the effects of a synthetic root exudate (SRE) on penetrometer resistance (PR), thermal conductivity (λ), hydraulic conductivity (k) and evaporation of water in a sandy soil. (rothamsted.ac.uk)
  • Increased interest in determining the thermal contact resistance encountered in various nanoscale devices derives from its role as a critical bottleneck to thermal transport at submicron scales. (asme.org)
  • This approach enables the accurate computation and examination of the relative magnitudes of constriction resistance, air thermal resistances, and the bulk resistance of the wire on transverse heat transport. (asme.org)
  • however, in the high gas-phase Knudsen regime, the constriction resistance remains the controlling factor for overall thermal conductance. (asme.org)
  • Ultrafast laser-based thermal metrology could enable us to probe the thermal transport process at scales smaller than that of carrier scattering processes. (aip.org)
  • In addition, extraordinary thermal transport processes that are not governed by diffusive Fourier's law, such as ballistic and hydrodynamic thermal transport, have been extensively studied. (aip.org)
  • In this work, the modified JKR model including the size effect of Young's modulus is integrated in the EMA model for k prediction, and experimental results in [Int. J. Heat Mass Tran. (arxiv.org)
  • This article aims at giving a contribution in the development of the thermal modelling of borehole heat storage systems, investigating the possibility of a GSHP. (researchgate.net)
  • Heat is thermal energy associated with temperature-dependent motion of particles. (wikipedia.org)
  • Therefore, we include a section on calculating the soil thermal conductivity, which determines the flow of heat. (dtic.mil)
  • Andrey Pereverzev and Tommy Sewell, "Heat-current filtering for Green-Kubo and Helfand-moment molecular dynamics predictions of thermal conductivity: Application to the organic crystal β-HMX," Int. J. Heat Mass Trans. (missouri.edu)
  • The thermal path is designed to reject as much heat as possible to ensure the system does not overheat. (asme.org)
  • Soil thermal characteristics affect germination, plant growth, and crop development and significantly affect microclimate [5,6]. (researchgate.net)
  • Fig. The calculated thermal conductivities of SWCNT networks versus the experimental values at 300 K . The blue line is given by our model. (sciencenet.cn)
  • The DOE-2 predictions made with and without temperature variation of thermal conductivity were compared to measured values. (lbl.gov)
  • For example, electronic interconnect materials will have comparable electrical and thermal conductivity to solder with an increased operating range of strain and temperature. (epj-conferences.org)
  • If the thermal conductivity of materials can be reduced and increased to extents that do not naturally exist, it will bring a significant impact to a wide range of applications. (aip.org)
  • While decades-old studies focused on dielectric materials where phonons are the dominant carriers, some of the recent studies explored a new realm where other carriers such as electrons and magnons have a complex interplay with phonons for thermal transport. (aip.org)
  • The materials available for thermal management are inherently limited, but new engineered materials provide unique opportunities to change how satellites adapt to thermal loads. (asme.org)
  • Till now, the theoretical models under the framework of effective medium approach (EMA) have been widely developed for the thermal conductivity (k) prediction of NPB. (arxiv.org)
  • Finally, the end of the report discusses the need for better mobility predictions in regions where seasonality is important and highly organic soils are prevalent. (dtic.mil)
  • Following the discussion on thermal conductivity, we examine existing approaches and their appropriateness to our investigation. (dtic.mil)
  • Finally, results obtained using both approaches are compared to classical analytic predictions. (edu.au)
  • In other cases, such as during a power anomaly, the oversized thermal path results in rapid cooling, culminating in mission failure due to thermal limits on the electronics or batteries. (asme.org)
  • In 2009, Professor Nicholls was elected as Fellow of the Royal Academy of Engineering, recognizing his World leading research in coating design , particularly low thermal conductivity thermal barrier coatings. (cranfield.ac.uk)
  • The high-temperature operation case is the thermal system's primary design consideration for CubeSats. (asme.org)
  • Multiple satellite thermal operation cases are investigated to determine the operation ranges, and the metamaterial's performance in various conditions is quantified. (asme.org)
  • The maximum temperature increase, thermal effective penetration depth (TEPD), and thermal effective field size (TEFS) were used as quality metrics. (bvsalud.org)
  • However, limited effort has been put on finding thermally conductive polymers using machine learning, mainly due to the lack of polymer thermal conductivity databases with reasonable data volume. (lammps.org)
  • The data are then employed to train a machine learning regression model to quantify the structure-thermal conductivity relation, which is further leveraged to screen polymer candidates in the PoLyInfo database with thermal conductivity >0.300 W/m-K. 121 polymers with MD-calculated thermal conductivity above this threshold are eventually identified. (lammps.org)
  • The triangles are predictions given by other models. (sciencenet.cn)
  • The resulting three dimensional grid models are used for thermal Lattice Monte Carlo (LMC) analyses. (edu.au)
  • The thermal conductivities of these halide-type ILs are in the same range as those of other ILs and have a very small temperature and pressure dependence as it is for other ILs. (oldcitypublishing.com)