Journal of Heat Transfer: Recent submissions
Now showing items 721-740 of 3611
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Comparison of Various RANS Models for Impinging Round Jet Cooling From a Cylinder
(American Society of Mechanical Engineers (ASME), 2019)The numerical analysis for the round jet impingement over a circular cylinder has been carried out. The v2f turbulence model is used for the numerical analysis and compared with the two equation turbulence models from the ... -
Numerical Simulations of Heat and Mass Transfer Process of a Direct Evaporative Cooler From a Porous Layer
(American Society of Mechanical Engineers (ASME), 2019)This paper deals with the numerical study of the combined heat and mass exchanges in the process of direct evaporative cooler, from a porous media of laminar air flow between two parallel insulated walls. The numerical ... -
A Historical Misperception on Calculating the Average Convection Coefficient in Tubes With Constant Wall Heat Flux
(American Society of Mechanical Engineers (ASME), 2019)The historical approach to averaging the convection coefficient in tubes of constant wall heat flux leads to quantitative errors in short tubes as high as 12.5% for convection into fully developed flows and 33.3% for ... -
Boiling Heat Transfer Coefficients in a Falling Film Helical Coil Heat Exchanger for the NH3–LiNO3 Mixture
(American Society of Mechanical Engineers (ASME), 2019)This paper reports the experimental data of boiling heat transfer coefficients for the ammonia–lithium nitrate mixture in a laminar falling film. The analyzed heat exchanger consists of a shell with an internal helical ... -
Study of Electric Field-Induced Evaporation Like Process and Nucleation in Nanoscale
(American Society of Mechanical Engineers (ASME), 2019)A proposal is made to demonstrate features of thermodynamic evaporation at the nanoscale using only an external electric field. The consequences of exposure to both uniform and nonuniform electric field on the water nanofilms ... -
A Mechanistic Model of Liquid Film Movements in Pipe Elbows for Annular Flow
(American Society of Mechanical Engineers (ASME), 2019)A mechanistic model of film movements is developed based on the treatments on the annular flow field. The initial conditions at the inlet are determined by adopting a validated film thickness correlation of fully developed ... -
Advances in Understanding of Pool Boiling Heat Transfer—From Earth on to Deep Space
(American Society of Mechanical Engineers (ASME), 2019)In this work, the effectiveness of the numerical simulations in advancing fundamental understanding of bubble dynamics and nucleate pool boiling heat transfer is discussed. The results of numerical simulations are validated ... -
Thermal–Hydraulic Performance Analysis of a Convergent Double Pipe Heat Exchanger
(American Society of Mechanical Engineers (ASME), 2019)The present investigation proposes an innovative convergent double pipe heat exchanger (C-DPHE). A two-dimensional (2D) axisymmetric heat transfer model with counterflow is employed to analyze the thermal and hydraulic ... -
A Numerical Study of Heat Transfer Enhancement by a Rectangular Cylinder Placed Parallel to the Heated Wall
(American Society of Mechanical Engineers (ASME), 2019)The flow around a rectangular cylinder mounted in the vicinity of a hot wall is numerically studied at a Reynolds number of 200. While the cylinder chord-to-height ratio C/W is varied from 2 to 10, the gap distance G from ... -
Pore Network Simulation and Experimental Investigation on Water-Heat Transport Process of Soil Porous Media
(American Society of Mechanical Engineers (ASME), 2019)The research on water-heat transport of soil porous media has important theoretical and practical significance for the problem of agricultural production and environmental governance. In this work, the water-heat transport ... -
Heat Pipe Array for Planar Cooling of Rotating Radar Systems
(American Society of Mechanical Engineers (ASME), 2019)This paper presents a planar cooling strategy for rotating radar systems using heat pipe technology. The proposed design uses six 1 m long heat pipes in parallel oriented in an evaporator-down modus at an elevation angle ... -
Influence of Corrugated Booster Reflectors in a Centrally Finned Twist Inserted Solar Thermal Collector on Heat Transfer and Thermal Performance Characteristics
(American Society of Mechanical Engineers (ASME), 2019)In this present work, the influence of corrugated booster reflectors (CBR) in a centrally finned twist (CFT) inserted solar thermal collector (SC) on heat transfer and thermal performance characteristics has been approached ... -
Methodology for the Measurement of the Heat Partitioning by Thermal Imaging in the Orthogonal Cutting Process
(American Society of Mechanical Engineers (ASME), 2019)The thermal conditions like temperature distribution and heat fluxes during metal cutting have a major influence on the machinability, the tool life time, and the metallurgical structure of the work piece material. Though ... -
Four-Probe Measurement of Thermal Transport in Suspended Few-Layer Graphene With Polymer Residue
(American Society of Mechanical Engineers (ASME), 2019)The presence of unknown thermal contact thermal resistance has limited prior two-probe thermal transport measurements of suspended graphene samples. Here, we report four-probe thermal transport measurements of suspended ... -
Unsteady Finite Amplitude Convection of Water–Copper Nanoliquid in High-Porosity Enclosures
(American Society of Mechanical Engineers (ASME), 2019)Unicellular Rayleigh–Bénard convection of water–copper nanoliquid confined in a high-porosity enclosure is studied analytically. The modified-Buongiorno–Brinkman two-phase model is used for nanoliquid description to include ... -
Study of Microdroplet Growth on Homogeneous and Patterned Surfaces Using Lattice Boltzmann Modeling
(American Society of Mechanical Engineers (ASME), 2019)We present droplet growth dynamics on homogeneous and patterned surfaces (surface with hydrophilic and hydrophobic region) using two-dimensional thermal lattice Boltzmann method (LBM). In the first part, we performed 2D ... -
Analytical Solution of Water Vapor Condensation in Flow Channel of Battery Pack
(American Society of Mechanical Engineers (ASME), 2019)The analytical solutions for condensation (and evaporation) rates of laminar humid air flow in the channels of a battery pack at both entrance and downstream regions are obtained/modeled. The effects of the entrance fluid ... -
Investigation of Nanofluid Heat Transfer in a Microchannel Under Magnetic Field Via Lattice Boltzmann Method: Effects of Surface Hydrophobicity, Viscous Dissipation, and Joule Heating
(American Society of Mechanical Engineers (ASME), 2019)In this paper, effect of Joule heating (JH), viscous dissipations (VD), and super hydrophobic surfaces on heat transfer of water–Al2O3 and water–CuO nanofluids in a microchannel has been investigated using lattice Boltzmann ... -
Theoretical Investigation of Al2O3 Nanoparticle Slip Mechanisms in High-Viscosity Two-Component Mixture in Two-Phase Flow
(American Society of Mechanical Engineers (ASME), 2019)The need for higher energy efficiency is driving the space conditioning and refrigeration industry toward the use of advanced technologies. Vapor compression cycles work with a mixture of refrigerant and lubricant, and ... -
Vaporization Heat Transfer in a Small Diameter Closed Two-Phase Thermosyphon
(American Society of Mechanical Engineers (ASME), 2019)This paper deals with vaporization heat transfer in a small diameter closed two-phase thermosyphon with a long evaporator and a short condenser, filled with water as operating fluid. The internal diameter of the evaporator ...