Journal of Heat Transfer: Recent submissions
Now showing items 1061-1080 of 3611
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Dropwise Condensation on Superhydrophobic Microporous Wick Structures
(The American Society of Mechanical Engineers (ASME), 2018)Previous research in dropwise condensation (DWC) on rough microtextured superhydrophobic surfaces has demonstrated evidence of high heat transfer enhancement compared to smooth hydrophobic surfaces. In this study, we ... -
Numerical Study on Merging and Interaction of Jet Diffusion Flames
(The American Society of Mechanical Engineers (ASME), 2018)A high velocity jet fire can cause catastrophic failure due to flame impingement or radiation. The scenario becomes more complicated when multiple jet fires exist following ignition of release from pressure relief valves ... -
A Novel Semi-Empirical Correlation for Wall Heat Transfer During Saturated Nucleate Flow Boiling
(The American Society of Mechanical Engineers (ASME), 2018)Most of the existing empirical correlations for wall heat transfer during flow boiling show a limited predictability stemming mainly from so-called the suppression and enhancement factors, which are introduced to describe ... -
Experimental Evidence of the Thermal Cloak Based on the Path Design of the Heat Flux
(The American Society of Mechanical Engineers (ASME), 2018)We recently showed theoretically that the infinite singularity of the thermal cloak designed by transformation thermodynamics could be eliminated by a new method—the path design of the heat flux without any approximation. ... -
Simultaneous Effects of Nonlinear Mixed Convection and Radiative Flow Due to Riga-Plate With Double Stratification
(The American Society of Mechanical Engineers (ASME), 2018)This paper addresses nonlinear mixed convection flow due to Riga plate with double stratification. Heat transfer analysis is reported for heat generation/absorption and nonlinear thermal radiation. Physical problem is ... -
Iterative Multiscale Approach for Heat Conduction With Radiation Problem in Porous Materials
(The American Society of Mechanical Engineers (ASME), 2018)This paper describes a thermal homogenization approach to the application of a multiscale formulation for heat conduction with radiation problems in a porous material. The suggested formulation enables to evaluate the ... -
Effects of Hydrophilic and Hydrophobic Surfaces on Start-Up Performance of an Oscillating Heat Pipe
(The American Society of Mechanical Engineers (ASME), 2018)Slug oscillations and heat transfer performance in the start-up stage of oscillating heat pipes (OHPs) with different surface wetting characteristics were investigated experimentally. The inner surfaces of the OHPs were ... -
Deterministic Phonon Transport Predictions of Thermal Conductivity in Uranium Dioxide With Xenon Impurities
(The American Society of Mechanical Engineers (ASME), 2018)We present a method for solving the Boltzmann transport equation (BTE) for phonons by modifying the neutron transport code Rattlesnake which provides a numerically efficient method for solving the BTE in its self-adjoint ... -
Optimization of the Heat Transfer Rate of Energy Systems of Conductive Bodies Confined to the Center of a Cavity
(The American Society of Mechanical Engineers (ASME), 2018)This paper is a numerical study conducted to investigate the conjugate flow and heat transfer occurring in three-dimensional (3D) natural convection. A cubical enclosure partially filled with porous block (central cubic) ... -
Advanced Cooling in Gas Turbines 2016 Max Jakob Memorial Award Paper
(The American Society of Mechanical Engineers (ASME), 2018)Gas turbines have been extensively used for aircraft engine propulsion, land-based power generation, and industrial applications. Power output and thermal efficiency of gas turbines increase with increasing turbine rotor ... -
Experimental Study of Thermal Performance of Nanofluid-Filled and Nanoparticles-Coated Mesh Wick Heat Pipes
(The American Society of Mechanical Engineers (ASME), 2018)The enhancements in thermal performance of mesh wick heat pipe (HP) using TiO2/H2O nanofluid (0.5, 1.0, and 1.5 vol %) as working fluid for different (50, 100, and 150 W) power input were investigated. Results showed maximum ... -
Statistical Approach to Radiative Transfer in the Heterogeneous Media of Thin-Wall Morphology—I: Theory
(The American Society of Mechanical Engineers (ASME), 2018)Foams, three-dimensional (3D)-printed cellular and honeycomb structures, and very oblate particles dispersed in a matrix are the examples of heterogeneous media with thin-wall morphology. Phase boundaries can also be ... -
Modeling of Anisotropic Scattering of Thermal Radiation in Pulverized Coal Combustion
(The American Society of Mechanical Engineers (ASME), 2018)In this work, the effect of applying different approximations for the scattering phase function on radiative heat transfer in pulverized coal combustion is investigated. Isotropic scattering, purely forward scattering, and ... -
Numerical and Experimental Analysis of Impinging Synthetic Jets for Cooling a Point-Like Heat Source
(The American Society of Mechanical Engineers (ASME), 2018)High power light emitting diodes (LEDs) being used for low and high beam in automotive lighting need active cooling of their heat sinks by radial or axial fans. But the moving elements of the fan cause abrasion, noise, and ... -
Modeling of Two-Phase Heat Exchangers With Zeotropic Fluid Mixtures
(The American Society of Mechanical Engineers (ASME), 2018)Heat exchangers are important components in many engineering applications. This paper proposes a numerical two-phase heat exchanger model with simultaneous heat transfer and pressure drop calculations. The presented model ... -
Application of the Semi-Analytic Complex Variable Method to Computing Sensitivities in Heat Conduction
(The American Society of Mechanical Engineers (ASME), 2018)Sensitivity information is often of interest in engineering applications (e.g., gradient-based optimization). Heat transfer problems frequently involve complicated geometries for which exact solutions cannot be easily ... -
Buoyancy Induced Convection From Biheaters in a Cavity: A Numerical Study
(The American Society of Mechanical Engineers (ASME), 2018)A computational study of natural convection from biheaters of finite thickness and finite conductivity placed on a finite thickness and a finite conductive bottom plate of a cavity is performed under constant heat input ... -
Optimal Structural Design of a Heat Sink With Laminar Single-Phase Flow Using Computational Fluid Dynamics-Based Multi-Objective Genetic Algorithm
(The American Society of Mechanical Engineers (ASME), 2018)This paper proposes a general method combining evolutionary algorithm and decision-making technique to optimize the structure of a minichannel heat sink (MCHS). Two conflicting objectives, the thermal resistance θ and the ... -
A Study on the Generalized Thermoelastic Problem for an Anisotropic Medium
(The American Society of Mechanical Engineers (ASME), 2018)A vector–matrix differential equation is formulated using normal mode analysis from the governing equations of a three-dimensional anisotropic half space in presence of heat source and gravity. The corresponding solution ... -
Subpixel Temperature Measurements in Plasma Jet Environments Using High-Speed Multispectral Pyrometry
(The American Society of Mechanical Engineers (ASME), 2018)A high-speed (2 kHz) near-infrared (1.0–1.65 μm) multispectral pyrometer was used for noninvasive measurements of the subpixel temperature distribution near the sharp leading edge of a wing exposed to a supersonic plasma ...