Journal of Heat Transfer: Recent submissions
Now showing items 1521-1540 of 3611
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Array Volume Fraction Dependent Thermal Transport Properties of Vertically Aligned Carbon Nanotube Arrays
(The American Society of Mechanical Engineers (ASME), 2016)Vertically aligned carbon nanotube (CNT) arrays are promising candidates for advanced thermal interface materials (TIMs) since they possess high mechanical compliance and high intrinsic thermal conductivity. However, the ... -
Numerical Solution of Radiative Transfer in a Real Participating Media
(The American Society of Mechanical Engineers (ASME), 2016)In this paper, the control volume finite element method (CVFEM) is coupled with the weighted sum of gray gases model (WSGGM) to study the radiative heat transfer in a nongray medium. To the best of our knowledge, the ... -
Surface Structure Enhanced Microchannel Flow Boiling
(The American Society of Mechanical Engineers (ASME), 2016)We investigated the role of surface microstructures in twophase microchannels on suppressing flow instabilities and enhancing heat transfer. We designed and fabricated microchannels with welldefined silicon micropillar ... -
Analytical Solution for Three Dimensional, Unsteady Heat Conduction in a Multilayer Sphere
(The American Society of Mechanical Engineers (ASME), 2016)An analytical solution has been obtained for the transient problem of threedimensional multilayer heat conduction in a sphere with layers in the radial direction. The solution procedure can be applied to a hollow sphere ... -
Existence of Universal Phase Diagrams for Describing General Pore Shape Resulting From an Entrapped Bubble During Solidification
(The American Society of Mechanical Engineers (ASME), 2016)This study shows that there exist a pair of universal and unique phase diagrams to describe general development of the pore shape in solid, resulting from a bubble captured by a solidification front. Like thermodynamics, ... -
Effect of Variable Properties and Radiation on Convective Heat Transfer Measurements at Engine Conditions
(The American Society of Mechanical Engineers (ASME), 2016)Convective heat transfer from a fluid to a surface is an approximately linear function of driving temperature if the properties within the boundary layer are approximately constant. However, in environments with large ... -
Generalized Correlations for Predicting Optimal Spacing of Decaying Heat Sources in a Conducting Medium
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents a numerical study for predicting the optimal spacing (OS) of decaying heat sources/sinks in a conducting medium. The optimal configuration that minimizes the overall thermal resistance between the ... -
Combined Visualization and Heat Transfer Measurements for Steam Flow Condensation in Hydrophilic and Hydrophobic Mini Gaps
(The American Society of Mechanical Engineers (ASME), 2016)Condensation enhancement was investigated for flow condensation in minichannels. Simultaneous flow visualization and heat transfer experiments were conducted in 0.952mm diameter minigaps. An open loop steam apparatus was ... -
Extension of the Concepts of Heat Capacity Rate Ratio and Effectiveness Number of Transfer Units Model to the Coupled Heat and Moisture Exchange in Liquid to Air Membrane Energy Exchangers
(The American Society of Mechanical Engineers (ASME), 2016)The underlying concept of the standard effectivenessnumber of transfer units (NTU) model is that the effectiveness of an exchanger can be correlated to two dimensionless parameters, namely, heat capacity ratio (Cr) and ... -
Effects of Suction and Freestream Velocity on a Hydromagnetic Stagnation Point Flow and Heat Transport in a Newtonian Fluid Toward a Stretching Sheet
(The American Society of Mechanical Engineers (ASME), 2016)Forced flow of an electrically conducting Newtonian fluid due to an exponentially stretching sheet is studied numerically. Free stream velocity is present and so is suction at the sheet. The governing coupled, nonlinear, ... -
On the Relaxation Time Scales of the Classical Thermodynamic Model for Heat Transfer in Quiescent Compressible Fluids
(The American Society of Mechanical Engineers (ASME), 2016)An approximate solution of the classical thermodynamic model for compressible heat transfer of a quiescent supercritical fluid under microgravity leads to the wellknown piston effect relaxation time tPE=tD/(خ³0−1)2, where ... -
A Note on Heat Transfer Enhancement in Laminar Impinging Flows With Shear Thinning Inelastic Fluids
(The American Society of Mechanical Engineers (ASME), 2016)A recent article presented axisymmetric numerical calculations showing substantial heat transfer enhancement in a laminar impinging flow with shear thinning inelastic fluids. This paper compares enhancement in planar and ... -
Computational Fluid Dynamic Simulation of Single and Two Phase Vortex Flow—A Comparison of Flow Field and Energy Separation
(The American Society of Mechanical Engineers (ASME), 2016)In the present work, a computational fluid dynamic (CFD) simulation has been performed to investigate single and twophase vortex tube. Air in compressed form and partially condensed phase are used as working fluid, ... -
Constructal Design of Rectangular Fin Intruded Into Mixed Convective Lid Driven Cavity Flows
(The American Society of Mechanical Engineers (ASME), 2016)The present work shows a numerical study of laminar, steady, and mixed convective flow inside liddriven square cavity with intruded rectangular fin in its lower surface. The main purpose here is to maximize the heat transfer ... -
Drying Kinetics Comparison of Methylcellulose Gel Versus Mango Fruit in Forced Convective Drying With and Without Electrohydrodynamic Enhancement
(The American Society of Mechanical Engineers (ASME), 2016)Electrohydrodynamic convective drying (EHD drying) is a novel drying method used to enhance forced convection drying (FC drying) by using a wireelectrode to create an electrostatic field. In a previous study, the efficiency ... -
Modeling of In Tube Condensation of Zeotropic Mixtures
(The American Society of Mechanical Engineers (ASME), 2016)Studies in the literature have shown that zeotropic mixture condensation rates are lower than those predicted using a purefluid approach. This has been attributed to the decrease in fluid temperature that occurs with ... -
The Effects of Ambient Pressure on the Initiation of the Freezing Process for a Water Droplet on a Cold Surface
(The American Society of Mechanical Engineers (ASME), 2016)This study investigated the effect of air pressure on the freezing process of a water droplet on a cold surface. A common belief is that bulk liquid water is incompressible and air pressure does not affect the freezing ... -
Computation of Effective Thermal Conductivity of Powders for Selective Laser Sintering Simulations
(The American Society of Mechanical Engineers (ASME), 2016)In this work, a discrete element model (DEM) is developed and implemented in the open source flow solver MFiX to simulate the effective thermal conductivity of powder beds for selective laser sintering (SLS) applications, ... -
Numerical and Experimental Investigation Into the Effects of Nanoparticle Mass Fraction and Bubble Size on Boiling Heat Transfer of TiO2–Water Nanofluid
(The American Society of Mechanical Engineers (ASME), 2016)Considering mass transfer and energy transfer between liquid phase and vapor phase, a mixture model for boiling heat transfer of nanofluid is established. In addition, an experimental installation of boiling heat transfer ... -
Flow Boiling in a Heat Sink Embedded With Hexagonally Linked Minichannels
(The American Society of Mechanical Engineers (ASME), 2016)The thermal hydraulic performance of a miniature heat sink during flow boiling of distilled water is presented in this article. The unique design of the heat sink contains a number of microchannels of 1 mm أ— 1 mm ...