Journal of Heat Transfer: Recent submissions
Now showing items 561-580 of 3611
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Regulation Mechanism of Microribs on Heat Transfer Process of Cracking Reactive Flow With Strong Thermal Stratification
(The American Society of Mechanical Engineers (ASME), 2020)Microrib is regarded as an efficient method to regulate the heat transfer and thermal cracking of hydrocarbon fuel in regenerative cooling channels of advanced aero-engines. In order to explore the regulation mechanism of ... -
Molecular Dynamics Simulation of Ultra-Fast Phase Transition in Water Nanofilms
(The American Society of Mechanical Engineers (ASME), 2020)Molecular dynamics simulations are used to explore explosive boiling of thin water films on a gold substrate. In particular, water films of 0.7, 1.6, and 2.5 nanometer thickness were examined. Three different surface ... -
Heuristic Optimization of Ribbed Cooling Channels With Variable Length and Roughness
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a heuristic optimization method for cooling channels with internal repeated-rib roughness. The method rapidly explores a design space to simultaneously optimize two geometric parameters, channel length, ... -
Numerical Study of the Effects of Confinement on Concurrent-Flow Flame Spread in Microgravity
(The American Society of Mechanical Engineers (ASME), 2020)The objective of this work is to investigate the aerodynamics and thermal interactions between a spreading flame and the surrounding walls as well as their effects on fire behaviors. A three-dimensional transient computational ... -
Laminar Convection in Circular Tubes With Developing Flow
(The American Society of Mechanical Engineers (ASME), 2020)The combined entry problem for the simultaneous development of heat and momentum transfer in a circular tube has been resolved over an extended range of inverse Graetz number ZH≥10−6 and for a wide range of Prandtl numbers ... -
A Bionic Hierarchy Generative Design for Conductive Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2020)A bionic hierarchy generative design algorithm inspired by the leaf vein growth process is presented for the layout design of heat conduction channels. The design domain is discretized based on the element-free Galerkin ... -
Computational Fluid Dynamics Investigation of Pitch Variations on Helically Coiled Pipe in Laminar Flow Region
(The American Society of Mechanical Engineers (ASME), 2020)Experimental investigations of the flows inside helically coiled pipe are difficult and may also be expensive, particularly for small diameters. Computational fluid dynamics (CFD) packages, which can easily construct the ... -
A Simple Immersed Boundary Method for Modeling Forced Convection Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2020)As nonbody-conforming numerical methods using simple Cartesian mesh, immersed boundary methods have become increasingly popular in modeling fluid–solid interaction. They usually do this by adding a body force term in the ... -
Water, Toluene, Methanol, and Ethanol Under Microwave Irradiation: Numerical Simulations of the Effect of the Vessel's Size
(The American Society of Mechanical Engineers (ASME), 2020)In this article, we study numerically the effect of the variation of the vessel's radius on the distribution of flow velocity and temperature for four solvents with different dielectric properties, frequently used in organic ... -
Effects of Boot-Shaped Rib on Heat Transfer Characteristics of Internal Cooling Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2020)Gas turbine engine has been widely applied to many heavy industries, such as marine propulsion and aerospace fields. Increasing turbine inlet temperature is one of the major ways to improve the thermal efficiency of gas ... -
The Thermal Load and Ablation Mechanism of Piston Subjected to Detonation
(The American Society of Mechanical Engineers (ASME), 2020)The piston in reciprocating engine would be badly ablated under severe knock. However, the mechanism of the detonation-induced thermal ablation of piston is still unclear. A detonation bomb device (DBD) was used to measure ... -
Rough Surface Turbulent Boundary Layer Heat Transfer Using Generalized Reynolds Analogies
(The American Society of Mechanical Engineers (ASME), 2020)Stanton number, St, calculations as a function of position, x, are made for turbulent, external boundary layer flow over aerodynamically rough surfaces and also for a fully developed duct flow with rough top and bottom ... -
A Correlation for Nusselt Number of Slip Gas Flow in Confined Porous Media
(The American Society of Mechanical Engineers (ASME), 2020)A clear understanding of flow and heat transfer at pore-scale level in microporous media is a topic of concern in microcooling/heating systems. In this work, a multiple-relaxation-time lattice Boltzmann method (LBM) is ... -
Thermohydraulic Behavior of Minichannel Surface Simulated With Gaussian Function and Actual Roughness Data Generated Using Three-Dimensional Optical Surface Profilometer
(The American Society of Mechanical Engineers (ASME), 2020)The effect of surface roughness on the thermohydraulics in minichannels has been studied numerically. Fluid flow (at low Reynolds number) through a typical three-dimensional (3D) channel subjected to constant heat flux (at ... -
The Structural Optimization of Dimple in Microchannel for Heat Transfer Enhancement
(The American Society of Mechanical Engineers (ASME), 2020)Dimple on the surface is widely used in electronic cooling equipment, turbine blades, and combustion chamber gaskets and so on, which is a good structure for heat transfer enhancement. In this paper, taking comprehensive ... -
Thermohydraulic Behavior of the Liquid–Vapor Flow in the Receiver Tube of a Solar Parabolic Trough Collector
(The American Society of Mechanical Engineers (ASME), 2020)Liquid–vapor flows are present in many industrial applications. In particular, in the solar field, these flows are encountered in the new generations of solar parabolic trough collectors with direct steam generation ... -
Three-Dimensional Designing of Octet-Truss Structures With Controlled Thermal Anisotropy
(The American Society of Mechanical Engineers (ASME), 2020)An octet-truss structure is considered as one of promising candidates for modern heat exchanger structures due to its light weight with stress supporting structure and high thermal performance as a multifunctional heat ... -
The Discrete Green's Function for Convective Heat Transfer—Part 2: Semi-Analytical Estimates of Boundary Layer Discrete Green's Function
(The American Society of Mechanical Engineers (ASME), 2020)This is the second paper in a set that defines the discrete Green's function (DGF). This paper focuses first on the turbulent boundary layer and presents two different methods to estimate the DGF. The long-element formulation ... -
Temperature-Rate-Dependent Thermoelasticity Theory With Memory-Dependent Derivative: Energy, Uniqueness Theorems, and Variational Principle
(The American Society of Mechanical Engineers (ASME), 2020)This article is focused on developing a new mathematical model on the temperature-rate-dependent thermoelasticity theory (Green–Lindsay), using the methodology of memory-dependent derivative (MDD). First, the energy theorem ... -
Thermodynamic Analysis of Microchannel Heat Sink With Cylindrical Ribs and Cavities
(The American Society of Mechanical Engineers (ASME), 2020)Heat transfer improvement in microchannel heat sink (MCHS) has been a challenge, because it increases the power requirements for the fluid flow. In the present study, MCHS with different wall, geometric, and design ...