Journal of Heat Transfer: Recent submissions
Now showing items 1161-1180 of 3611
-
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) ... -
Infrared Absorption Characteristics Analysis for Annulus Nanostructure of Aluminum Substrate
(The American Society of Mechanical Engineers (ASME), 2017)An annulus-shaped nanostructure having a three-layer structure consisting of an annulus aluminum pattern, Al2O3 spacer layer, and Al substrate is presented. High absorption peaks can be easily obtained between 2.5 μm and ... -
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, ... -
Numerical Study of Inlet Turbulators Effect on the Thermal Characteristics of a Jet Propulsion-Fueled Combustor and Its Hazardous Pollutants Emission
(The American Society of Mechanical Engineers (ASME), 2017)This work numerically studies the effects of inlet air and fuel turbulators on the thermal behavior of a combustor burning the jet propulsion (JP) (kerosene-surrogate) fuel and its resulting pollutants emission including ... -
Experimental Investigation on Heat Transfer Performance of a Flat Plate Heat Pipe With MWCNTS-Acetone Nanofluid
(The American Society of Mechanical Engineers (ASME), 2017)This paper experimentally investigates how different mass concentration and aspect ratio multiwall carbon nanotubes (MWCNTs) acetone nanofluid affects the heat transfer performance of a flat plate heat pipe (FPHP). Different ... -
Combined Dielectrophoretic and Electrohydrodynamic Conduction Pumping for Enhancement of Liquid Film Flow Boiling
(The American Society of Mechanical Engineers (ASME), 2017)This paper extends previous liquid film flow boiling studies by including the effect of an additional electrohydrodynamic (EHD) force, namely, the dielectrophoretic (DEP) force. Rather than using only EHD conduction pumping ... -
Computational Fluid Dynamics Simulations of Convective Pure Vapor Condensation Inside Vertical Cylindrical Condensers
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents the results from computational fluid dynamics (CFD) simulations of heat and mass transfer of pure vapor flowing and condensing in a vertical cylindrical condenser system at various inlet temperatures, ... -
Investigation of Bubble Frequency for Slug Flow Regime in a Uniformly Heated Horizontal Microchannel
(The American Society of Mechanical Engineers (ASME), 2017)Slug flow is an essential flow pattern observed in microchannels where its transition boundaries in microchannels are characterized by two complex hydrodynamic phenomena, the bubble confinement and the bubble coalescence. ... -
Forming Mechanism of Bump Shape in Pulsed Laser Melting of Stainless Steel
(The American Society of Mechanical Engineers (ASME), 2017)Laser surface topography has great applications in mechanical, medical, and electrical industries. This paper proposes a mechanism for the shape formation of stainless steel by pulsed laser melting. A 2D axisymmetric finite ... -
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 ... -
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 ... -
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 ... -
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, ... -
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 ... -
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 ... -
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 ... -
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 ...