Browsing Journal of Heat Transfer by Issue Date
Now showing items 1-20 of 3611
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Heat Transfer Characteristics of the Multicavity Tips at Different Turbulence Levels
(The American Society of Mechanical Engineers (ASME), 1/12/2023 )A comprehensive understanding of the tip heat transfer characteristics is important to the blade tip design. In this work, the heat transfer coefficient (h) data of several multicavity tips was measured using a steady-state ... -
Effective Thermal Conductivity Model of Micron Hollow Sphere or Phase Change Material/Opacifier-SiO2 Aerogel Composites
(The American Society of Mechanical Engineers (ASME), 1/12/2023 )Pure SiO2 aerogel has a strong light transmittance in the infrared wavebands from 3.0 to 8.0 μm, and an opacifier could efficiently reduce aerogel's radiative thermal conductivity (λr), especially at high temperatures ... -
Quasi-Steady Simulation of Glaze Ice Accretion and Heat Transfer in the Supercooled Large Droplet Regime in Atmospheric Turbulent Air Flow
(The American Society of Mechanical Engineers (ASME), 1/12/2023 )To avoid the use of a computationally intensive full unsteady simulation while providing an accurate solution, a quasi-steady simulation has been performed to study glaze and mixed ice accretion in the supercooled large ... -
Simulation and Property Characterization of Nanoparticle Thermal Conductivity for a Microscale Selective Laser Sintering System
(The American Society of Mechanical Engineers (ASME), 1/12/2023 )Current additive manufacturing (AM) technologies are typically limited by the minimum feature sizes of the parts they can produce. This issue is addressed by the microscale selective laser sintering system (μ-SLS), which ... -
Mitigation of Heat Transfer Deterioration of Supercritical CO2 Vertical Tube Upward Flows by Introducing Truncated-Ribs in Helical-Like Distribution
(The American Society of Mechanical Engineers (ASME), 1/12/2023 )To effectively alleviate the heat transfer deterioration (HTD) phenomenon of supercritical CO2 flow in a vertical circular tube, this paper proposes multiple truncated ribs from a whole O-ring rib but distributed in ... -
Accurate Prediction of Transport Coefficients of an Evaporating Liquid Drop
(The American Society of Mechanical Engineers (ASME), 1/4/2023 1)Numerical simulations were carried out to study the evaporation of a drop that is released into a parallel stream of fluid at a higher temperature. A coupled level-set and volume-of-fluid (CLSVOF) interface capturing method ... -
Additive Manufacturing of a High Temperature, Ni-Based Superalloy Compact Heat Exchanger: A Study on the Role of Select Key Printing Parameters
(The American Society of Mechanical Engineers (ASME), 1/4/2023 1)Compared to state-of-the-art heat exchangers, manifold-microchannel heat exchangers have shown superior heat removal density (kW/kg) at moderate pressure drops. However, manifold-microchannel heat exchangers made of Ni-based ... -
Local Heat Transfer Measurements for an Impinging Synthetic Jet
(The American Society of Mechanical Engineers (ASME), 11/10/2022)Research results demonstrate the heat transfer effectiveness of an impinging synthetic jet toward cooling a plane normal to it. The utility of the synthetic jet lies in that the supply of coolant comes from the device ... -
Modeling of Phase Change in Nanoconfinement Using Moment Methods
(The American Society of Mechanical Engineers (ASME), 11/17/2022)Accurate prediction of liquid–vapor phase change phenomena is critical in the design of thin vapor chambers and microheat pipes for the thermal management of miniaturized electronic systems. In view of this, we have ... -
New Temperature and Heat Loss Charts for One-Dimensional, Transient Heat Conduction
(The American Society of Mechanical Engineers (ASME), 11/17/2022)New temperature and heat loss charts have been created for one-dimensional, transient conduction. In the new charts, time is scaled by a weighted sum of the lumped capacitance time scale tLC and the diffusion time scale ... -
Unified Integral Transforms and Non-Classical Eigenvalue Problems in Heat and Mass Transfer
(The American Society of Mechanical Engineers (ASME), 11/17/2022)The generalized integral transform technique (GITT) is reviewed as a computational–analytical methodology in linear and nonlinear convection–diffusion problems, based on eigenfunction expansions extracted from characteristic ... -
Stagnation Point Heat Transfer to an Axisymmetric Impinging Jet at Transition to Turbulence
(The American Society of Mechanical Engineers (ASME), 11/22/2022)A round air jet issuing from a long straight pipe and impinging perpendicularly onto a heated flat plate was investigated experimentally. The Reynolds number (Re) covered the fully laminar, transitional, and fully turbulent ... -
Memorial Tributes to Professor Ivan Catton
(The American Society of Mechanical Engineers (ASME), 12/12/2022)The following is a tribute by Dr. Vijay K. Dhir.Professor Ivan Catton was born in British Columbia, Canada. At a young age, he migrated with his family to the Los Angeles area. He was a Bruin through-and-through: twice an ... -
Design Under Uncertainties of the Thermal Ablation Treatment of Skin Cancer
(The American Society of Mechanical Engineers (ASME), 12/12/2022)This computational work deals with the optimal design of the thermal ablation treatment of skin cancer, by considering uncertainties in the model parameters. The tumor and other tissues were heated by a laser. Nanoparticles ... -
Thermal Conductivity of Some Ceramic Materials at Cryogenic Temperatures
(The American Society of Mechanical Engineers (ASME), 12/19/2022)The application of ceramics in cryogenic systems is expanding. Thermophysical properties of these ceramics in cryogenic temperatures are thus needed. In this investigation, the thermal conductivities of 7740 Pyrex, 99.99% ... -
Buoyancy-Induced Instability of a Power-Law Fluid Saturating a Vertical Porous Slab
(The American Society of Mechanical Engineers (ASME), 12/19/2022)Many engineering applications involve porous media and rely on non-Newtonian working fluids. In this paper, the seepage flow of a non-Newtonian fluid saturating a vertical porous layer is studied. The buoyant flow is ... -
Solution of Unsteady Flow Equations for Nanoscale Heat and Mass Transfer in Diverse Applications
(The American Society of Mechanical Engineers (ASME), 12/19/2022)A new innovative stable time-dependent compressible flow solution over the order of nanoseconds is provided here for wide-ranging critically important challenging applications. Specifically, a solution of the highly complex ... -
Multi-Objective Optimization of Convective Heat Transfer for a Composite Internal and Film Cooling Structure
(The American Society of Mechanical Engineers (ASME), 12/9/2022 )This paper conducted a multi-objective optimization work for a composite internal and film cooling structure. The pitch-to-height ratio of the ribs, the inclination angle of the ribs, and the inclination angle of the film ... -
Mixing in a Misaligned Serpentine Micromixer With Flow Splitting and Recombination
(The American Society of Mechanical Engineers (ASME), 12/9/2022 )Serpentine micromixers are simple in design, have a high mixing performance, and thus are preferable among passive micromixers. Conventional geometries such as square-wave, circular, and zigzag have widely been investigated ... -
Dielectrophoretically-Assisted Electrohydrodynamic-Driven Liquid Film Flow Boiling in the Presence and Absence of Gravity
(The American Society of Mechanical Engineers (ASME), 12/9/2022 )The ongoing development of modern electronic systems leads to smaller, more powerful devices that are expected to operate in complex environments. Due to this, advanced thermal management technologies are required to meet ...