Journal of Heat Transfer: Recent submissions
Now showing items 1621-1640 of 3611
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Contact Angle Measurement of Liquid Hydrogen (LH2) in Stainless Steel and Aluminum Cells
(The American Society of Mechanical Engineers (ASME), 2016)One of the key limitations to longterm space missions is to avoid propellant boiloff in a microgravity space environment. Even with the use of active and passive controls of propellants, boil off is inevitable. Longterm ... -
Heat Transfer Gallery
(The American Society of Mechanical Engineers (ASME), 2016)The purpose of publishing these entries is to draw attention to the innovative features of visualization techniques and esthetic qualities of thermal and fluidic transports. To focus on visualization images and schematics ... -
Infrared Visualization of the Cavity Effect Using Origami Inspired Surfaces
(The American Society of Mechanical Engineers (ASME), 2016)Surface temperature and apparent radiative surface properties (emissivity, absorptivity) may be controlled by varying surface topology through a phenomenon known as the cavity effect. Cavities created by origami folds offer ... -
Combined Microstructure and Heat Transfer Modeling of Carbon Nanotube Thermal Interface Materials1
(The American Society of Mechanical Engineers (ASME), 2016)A microstructuresensitive thermomechanical simulation framework is developed to predict the mechanical and heat transfer properties of vertically aligned CNT (VACNT) arrays used as thermal interface materials (TIMs). The ... -
Passive Heat Transfer in Solid State Lighting: Relaxing the Boussinesq Approximation Analytically in the Vertical Channel
(The American Society of Mechanical Engineers (ASME), 2016)Analytical relations between the heat flux, temperature rise, thermal boundary layer thickness, and characteristic velocity have been derived for the twodimensional vertical channel, without use of the Boussinesq approximation. ... -
Absorption Spectra and Electron Vibration Coupling of Ti:Sapphire From First Principles
(The American Society of Mechanical Engineers (ASME), 2016)Firstprinciples calculations are performed to study the absorption spectra and electronvibration coupling of titaniumdoped sapphire (Ti:Al2O3). Geometry optimization shows a local structure relaxation after the doping of ... -
Convective Heat Transfer in Elliptical Microchannels Under Slip Flow Regime and H1 Boundary Conditions
(The American Society of Mechanical Engineers (ASME), 2016)In this work, hydrodynamically and thermally fully developed gas flow through elliptical microchannels is numerically investigated. The Navier–Stokes and energy equations are solved by considering the firstorder slip ... -
Thermal Radiation From Vertical Turbulent Jet Flame: Line Source Model
(The American Society of Mechanical Engineers (ASME), 2016)It is often reported that a jet fire occurs in industrial installations or in the transportation of hazardous materials and could amplify the scale of accident by imposing lots of heat on people and nearby facilities. This ... -
Measurement of High Performance Thermal Interfaces Using a Reduced Scale Steady State Tester and Infrared Microscopy
(The American Society of Mechanical Engineers (ASME), 2016)Thermal interface materials (TIMs) have reached values approaching the measurement uncertainty of standard ASTM D5470 based testers of approximately آ±1 أ— 10−6 m2 K/W. This paper presents a miniature ASTMtype ... -
Modeling of Thermal Cracking Furnaces Via Exergy Analysis Using Hybrid Artificial Neural Network–Genetic Algorithm
(The American Society of Mechanical Engineers (ASME), 2016)In this study, we try to make an exergy analysis of an olefin cracking furnace more understandable by coupling it with the use of an artificial neural network–generic algorithm (ANN–GA) modeling. The presented method ... -
Characterization of Turbulent Heat Transfer in Ribbed Pipe Flow
(The American Society of Mechanical Engineers (ASME), 2016)In the current investigation, we performed large eddy simulation (LES) of turbulent heat transfer in circular ribbedpipe flow in order to study the effects of periodically mounted square ribs on heat transfer characteristics. ... -
Thermocapillary Flow of a Thin Nanoliquid Film Over an Unsteady Stretching Sheet
(The American Society of Mechanical Engineers (ASME), 2016)The twodimensional flow of a thin nanoliquid film over an unsteady stretching sheet is studied under the assumption of planar film thickness when the sheet is heated/cooled along the stretching direction. The governing ... -
Cooling of a Hot Torus
(The American Society of Mechanical Engineers (ASME), 2016)The problem of a hot torus left to cool in a medium of known temperature is studied. We write the governing equation in toroidal coordinates and expand the temperature in terms of a series in the angular direction. The ... -
Development of New Critical Heat Flux Correlation for Microchannel Using Energy Based Bubble Growth Model
(The American Society of Mechanical Engineers (ASME), 2016)Critical heat flux (CHF) is a key design consideration for the systems involving heat dissipation through boiling application. It dictates the maximum limit of performance of heat transfer systems. Abrupt and substantial ... -
Dynamic Behavior of a Small Water Droplet Impact Onto a Heated Hydrophilic Surface
(The American Society of Mechanical Engineers (ASME), 2016)The aim of this study is to investigate the influence of the surface wettability on the dynamic behavior of a water droplet impacting onto a heated surface made of stainless steel grade 304 (Sus304). The surface wettability ... -
Electrohydrodynamic Conduction Pumping Driven Liquid Film Flow Boiling on Bare and Nanofiber Enhanced Surfaces
(The American Society of Mechanical Engineers (ASME), 2016)Liquid film flow boiling heat transfer driven by electrohydrodynamic (EHD) conduction pumping is experimentally studied on a surface with a novel metalplated nanofibermat coating. The nanotextured surface is formed on a ... -
Effect of Liquid Properties on Phase Change Heat Transfer in Porous Wick Structures
(The American Society of Mechanical Engineers (ASME), 2016)In a heat pipe, operating fluid saturates wick structures system and establishes a capillarydriven circulation loop for heat transfer. Thus, the thermophysical properties of the operating fluid inevitably impact the ... -
Enhanced Flow Boiling of Ethanol in Open Microchannels With Tapered Manifolds in a Gravity Driven Flow
(The American Society of Mechanical Engineers (ASME), 2016)There is a clear need for cooling high heat flux generating electronic devices using a dielectric fluid without using a pump. This paper explores the feasibility of employing ethanol as a dielectric fluid in a horizontal, ... -
Investigations on the Condensation Heat Transfer Performance of Stainless Steel Edge Shaped Finned Tubes
(The American Society of Mechanical Engineers (ASME), 2016)The thirdgeneration enhanced heat transfer technologies, such as threedimensional fin and dimple, are still important means of improving energy efficiency. This paper analyzes the condensation heat transfer performances ... -
Investigation on the Effect of Type and Size of Nanoparticles and Surfactant on Pool Boiling Heat Transfer of Nanofluids
(The American Society of Mechanical Engineers (ASME), 2016)In our efforts to improve the pool boiling heat transfer of water, three sets of experiments are carried out to investigate the best coolant for heat removal among alumina, silica, and zinc oxide as nanoparticles and water ...