Journal of Heat Transfer: Recent submissions
Now showing items 641-660 of 3611
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Porosity Manipulation in Bottom-Enclosed Vertical Porous Structure to Improve Natural Convection Cooling Efficacy: A Computational Study
(The American Society of Mechanical Engineers (ASME), 2020)Flow acceleration by imposing flow channelization structures like chimneys and/or solid barriers to improve natural convection cooling in pure fluids, is a well-known technique and a thoroughly investigated topic in thermal ... -
Experimental and Numerical Investigations on the Heat Transfer of Film Cooling With Cylindrical Holes Fed With Internal Coolant Cross Flows
(The American Society of Mechanical Engineers (ASME), 2020)The heat transfer coefficient of cylindrical holes fed by varying internal cross-flow channels with different cross-flow Reynolds numbers Rec is experimentally studied on a low-speed flat-plate facility. Three coolant cross ... -
The Effect of Metal Foam Thickness on Jet Array Impingement Heat Transfer in High-Porosity Aluminum Foams
(The American Society of Mechanical Engineers (ASME), 2020)High-porosity metal foam (MF) is a popular option for high-performance heat exchangers as it offers significantly higher heat transfer participation area per unit volume compared to other convection enhancement cooling ... -
Postextrusion Heating in Three-Dimensional Printing
(The American Society of Mechanical Engineers (ASME), 2020)Stresses result when polymer feed stock is extruded through the nozzle of a three-dimensional (3D) printer, causing undesirable surface roughness called “sharkskin,” which hinders effective bonding to the substrate. A ... -
Experimental Study of the Effect of Water Spray in the Air on Thermal Transfers Along a Plate of an Exchanger
(The American Society of Mechanical Engineers (ASME), 2020)This study is an experimental investigation of the oceanic environment effect on a plate heat exchanger performance. Indeed, an experiment was carried out on a single plate of the exchanger to generate a turbulent airflow ... -
Exact Solutions to the Thermal Entry Problem for Laminar Flow Through Annular Ducts
(The American Society of Mechanical Engineers (ASME), 2020)The thermal entrance region for laminar-forced convection of a Newtonian fluid in an annular tube is solved by separation of variables using as many eigenvalues and eigenfunctions as needed to report exact results for a ... -
Refinement of the Generalized Graetz Problem Correlation With New Benchmark Calculations
(The American Society of Mechanical Engineers (ASME), 2020)A recently proposed generalized correlation for the Graetz problem in heat transfer has two fitted constants that can be related back to two fundamental constants of fully developed transport. A new set of benchmark solutions ... -
Regulative Characteristic of Methanol–Copper Heat Pipes for Asteroid Lander “MASCOT”
(The American Society of Mechanical Engineers (ASME), 2020)Variable conductance heat pipes (VCHPs) are the main part of the MASCOT (mobile asteroid surface SCOuT) lander thermal control system (TCS). They provide variable conductivity by utilizing the heat transfer limitations. ... -
Computational Fluid Dynamics Studies on Unstable Oscillatory Direct Contact Condensation of Subsonic Steam Jets in Water Cross-Flow
(The American Society of Mechanical Engineers (ASME), 2020)In the last decade, researchers working on direct contact condensation (DCC) have focused their attention on studying the effect of liquid cross-flow, in contrast to the conventional stagnant liquid pool condensers. ... -
Three-Dimensional Transient Heat Conduction Equation Solution for Accurate Determination of Heat Transfer Coefficient
(The American Society of Mechanical Engineers (ASME), 2020)Accurate quantification of local heat transfer coefficient (HTC) is imperative for design and development of heat exchangers for high heat flux dissipation applications. Liquid crystal and infrared thermography (IRT) are ... -
Inversion for Fire Heat-Release Rate Using Heat Flux Measurements
(The American Society of Mechanical Engineers (ASME), 2020)In fire hazard calculations, knowledge of the heat-release rate (HRR) of a burning item is imperative. Typically, room-scale calorimetry is conducted to determine the HRRs of common combustible items. However, this process ... -
Special Section: Memorial Festschrift for the Late Professor Frank Kreith Sunrise Delayed but the Sun Shines Brightly: The Energy-Sustainability Quandary and Legacy of Professor Frank Kreith
(The American Society of Mechanical Engineers (ASME), 2020)The imperative of conserving energy resources, acerbated by the ever-rising global demand and consumption, has been acutely underscored by many global events in the last two decades. The cause of energy security that has ... -
Study on Effects of Novel Cross Sections of Microchannel Heat Sink on Thermohydraulic Performance
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, three-dimensional simulations to study the performance of microchannel heat sinks (MCHS) with rectangular, hexagonal, semicircular and various novel cross section (such as barrel, fan shaped, L shaped, ... -
Asymmetric Conduction in an Infinite Functionally Graded Cylinder: Two-Dimensional Exact Analytical Solution Under General Boundary Conditions
(The American Society of Mechanical Engineers (ASME), 2020)This paper focuses on using an analytical method to obtain an exact solution for a long cylindrical vessel made of functionally graded materials (FGMs). Heat conduction equations are assumed to be in both radial and ... -
Structural Optimization and Heat Transfer Performance Analysis of a Cone-Column Combined Heat Sink
(The American Society of Mechanical Engineers (ASME), 2020)To address the impact of temperature on the normal operation and service life of high-power electronic components, a circular microchannel heat sink with cones has been designed. The cones are evenly arranged inside circular ... -
Hybrid Phase-Change Lattice Boltzmann Simulation of Vapor Condensation on Vertical Subcooled Walls
(The American Society of Mechanical Engineers (ASME), 2020)Saturated vapor condensation on homogenous and heterogeneous subcooled walls is presented in this study by adopting a hybrid phase-change multiple-relaxation-time Lattice Boltzmann model. The effects of wall wettability ... -
Semi-Analytical Solution of the Graetz Problem With Uniform Wall Heat Flux Utilizing the Transversal Method of Lines
(The American Society of Mechanical Engineers (ASME), 2020)This study addresses the second Graetz problem with prescribed wall heat flux employing the transversal method of lines (TMOL), which deviates significantly from the traditional mathematical procedures employed in the past. ... -
Investigation of Numerical Evaluation Improvement for Three-Dimensional Infinite Cylindrical Heat Conduction Problems
(The American Society of Mechanical Engineers (ASME), 2020)To estimate the thermal properties from transient data, a model is needed to produce numerical values with sufficient precision. Iterative regression or other estimation procedures must be applied to evaluate the model ... -
Dropwise Condensation 2019 Max Jakob Memorial Award Paper
(The American Society of Mechanical Engineers (ASME), 2020)It was an honor to receive the Max Jakob Memorial Award for 2018. This invited paper is based on the award lecture and is written in an informal style expanding on the lecture and focusing on work in which I have been ... -
Effect of Radiation on Hydromagnetic Mixed Convective Flow in a Vertical Channel Filled With Porous Media: A Thermal Nonequilibrium Approach
(The American Society of Mechanical Engineers (ASME), 2020)This work addresses the magnetic and radiation effects on the fully developed mixed convective flow in a vertical channel occupied by a porous medium with the thermal nonequilibrium state. The assumption that the fluid is ...