Journal of Heat Transfer: Recent submissions
Now showing items 1341-1360 of 3611
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Thermal Rectification of Silicene Nanosheets With Triangular Cavities by Molecular Dynamics Simulations
(The American Society of Mechanical Engineers (ASME), 2017)Silicene, the silicon-based two-dimensional structure with honeycomb lattice, has been discovered and expected to have tremendous application potential in fundamental industries. However, its thermal transport mechanism ... -
Nano-Phase Change Materials for Electronics Cooling Applications
(The American Society of Mechanical Engineers (ASME), 2017)The present work aims at investigating a new challenging use of aluminum oxide (Al2O3) nanoparticles to enhance the thermal properties (thermal conductivity, specific heat, and latent heat) of pure paraffin waxes to obtain ... -
A Computational Simulation of Using Tungsten Gratings in Near-Field Thermophotovoltaic Devices
(The American Society of Mechanical Engineers (ASME), 2017)Near-field thermophotovoltaic (NFTPV) devices have received much attention lately as an alternative energy harvesting system, whereby a heated emitter exchanges super-Planckian thermal radiation with a photovoltaic (PV) ... -
Tungsten Nanowire Metamaterials as Selective Solar Thermal Absorbers by Excitation of Magnetic Polaritons
(The American Society of Mechanical Engineers (ASME), 2017)The present study focuses on nanowire-based metamaterials selective solar absorbers. Finite-difference time-domain (FDTD) simulation is employed for numerically designing a broadband solar absorber made of lossy tungsten ... -
High Throughput Cell-Free Extraction of Plasma by an Integrated Microfluidic Device Combining Inertial Focusing and Membrane
(The American Society of Mechanical Engineers (ASME), 2017)Plasma is a host of numerous analytes such as proteins, metabolites, circulating nucleic acids (CNAs), and pathogens, and it contains massive information about the functioning of the whole body, which is of great importance ... -
Theoretical and DSMC Studies on Heat Conduction of Gas Confined in a Cuboid Nanopore
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents a theoretical and numerical study on the heat conduction of gas confined in a cuboid nanopore, in which there exists a temperature difference between the top and bottom walls and the side walls are ... -
Investigating Entropy Generation in a Thermal Cloak Corresponding Different Material Layer Number
(The American Society of Mechanical Engineers (ASME), 2017)In this study, entropy analysis was introduced to characterize the thermodynamic properties of a two-dimensional (2D) thermal cloak consisting of multiple layers. The local entropy generation rate distribution was obtained, ... -
Experimental Investigation of the Air Flow Behavior and Heat Transfer Characteristics in Microchannels With Different Channel Lengths
(The American Society of Mechanical Engineers (ASME), 2017)This paper attempts to experimentally investigate the influence of channel length on the flow behavior and heat transfer characteristics in circular microchannels. The diameters of the channels were 0.4 mm and the length ... -
Sub-Beam Size Temperature Measurement of Heavily Doped Silicon Heater Using Two-Wavelength Thermoreflectance Microscopy
(The American Society of Mechanical Engineers (ASME), 2017)This work describes a novel technique for simultaneously determining local temperature and thickness of a heavily doped Si heater having a submicron width by using two-wavelength thermoreflectance microscopy. The doped ... -
Performance Analysis of a Near-Field Thermophotovoltaic Device With a Metallodielectric Selective Emitter and Electrical Contacts for the Photovoltaic Cell
(The American Society of Mechanical Engineers (ASME), 2017)The photon transport and energy conversion of a near-field thermophotovoltaic (TPV) system with a selective emitter composed of alternate tungsten and alumina layers and a photovoltaic cell sandwiched by electrical contacts ... -
High Reflectance of Artificial Opals and Engineering Applications
(The American Society of Mechanical Engineers (ASME), 2017)The artificial opals are three-dimensional photonic crystals (PCs) whose microspheres are arranged periodically in a face-centered-cubic (FCC) lattice. In this work, we investigated the reflective properties of artificial ... -
Effect of Local Thermal Nonequilibrium on the Stability of Natural Convection in an Oldroyd-B Fluid Saturated Vertical Porous Layer
(The American Society of Mechanical Engineers (ASME), 2017)The effect of local thermal nonequilibrium (LTNE) on the stability of natural convection in a vertical porous slab saturated by an Oldroyd-B fluid is investigated. The vertical walls of the slab are impermeable and maintained ... -
The Statistical Analysis of Droplet Train Splashing After Impinging on a Superheated Surface
(The American Society of Mechanical Engineers (ASME), 2017)An orderly droplet splashing is established when a water droplet train impinges onto a superheated copper surface. The droplets continuously impinge onto the surface with a rate of 40,000 Hz, a diameter of 96 μm or 120 μm, ... -
Thermal Performance Analysis of Biporous Metal Foam Heat Sink
(The American Society of Mechanical Engineers (ASME), 2017)The present study presents a concept of biporous metal foam heat sink applicable to electronic cooling. This heat sink has two metal foam layers arranged in parallel along the primary flow direction, with different metal ... -
Modified Outlet Boundary Condition Schemes for Large Density Ratio Lattice Boltzmann Models
(The American Society of Mechanical Engineers (ASME), 2017)Outlet boundary conditions (OBCs) and their numerical descriptions are critical to computational fluid dynamics (CFD) since they have significant influence on the numerical accuracy and stability. They present significant ... -
Electron–Phonon Coupled Heat Transfer and Thermal Response Induced by Femtosecond Laser Heating of Gold
(The American Society of Mechanical Engineers (ASME), 2017)Ab initio simulation is one of the most effective theoretical tools to study the electrons evolved heat transfer process. Here, we report the use of finite-temperature density functional theory (DFT) to investigate the ... -
Foreword to Special Issue on Micro/Nanoscale Heat and Mass Transfer—Part I
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Study of Microstructure-Based Effective Thermal Conductivity of Graphite Foam
(The American Society of Mechanical Engineers (ASME), 2017)As a relatively new type of functional material, porous graphite foam exhibits unique thermophysical properties. It possesses the advantages of low density, high specific surface area, and high bulk thermal conductivity ... -
Cross-Flow Heat Exchanger: Volume-Averaging Formulation of a Unit Cell Model and Thermal Performance Analysis
(The American Society of Mechanical Engineers (ASME), 2017)A formulation of the unit cell model and the corresponding thermal performance analysis for the cross-flow heat exchanger are carried out, with the design goal of dissipating 175 W from a high-power electronic chip in a ... -
Thermal Performance of Miniscale Heat Sink With Jet Impingement and Dimple/Protrusion Structure
(The American Society of Mechanical Engineers (ASME), 2017)Cooling technique in a miniscale heat sink is essential with the development of high-power electronics, such as electronic chip. As heat transfer techniques, jet impingement cooling and convective cooling by roughened ...