Journal of Heat Transfer: Recent submissions
Now showing items 1261-1280 of 3611
-
Effect of Surface Roughness on Pool Boiling Heat Transfer of Water on a Superhydrophilic Aluminum Surface
(The American Society of Mechanical Engineers (ASME), 2017)The effect of surface roughness on the pool boiling heat transfer of water was investigated on superhydrophilic aluminum surfaces. The formation of nanoscale protrusions on the aluminum surface was confirmed after immersing ... -
Efficiency of the Longitudinal Fins of Trapezoidal Profile in Motion
(The American Society of Mechanical Engineers (ASME), 2017)The present work is concerned with the heat transfer enhancement and efficiency in the moving longitudinal fins having trapezoidal cross sections. Finding analytical solutions is targeted so that efficiency of trapezoidal ... -
Experimental Effectiveness of Sierpinski Carpet Fractal Fins in a Natural Convection Environment
(The American Society of Mechanical Engineers (ASME), 2017)When certain fractal geometries are used in the design of fins or heat sinks, the surface area available for heat transfer can be increased while system mass can be simultaneously decreased. In order to assess the thermal ... -
Numerical Study of Transient Convection With Volumetric Radiation Using an Hybrid Lattice Boltzmann Bhatnagar–Gross–Krook–Control Volume Finite Element Method
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, a new hybrid numerical algorithm is developed to solve coupled convection–radiation heat transfer in a two-dimensional cavity containing an absorbing, emitting, and scattering medium. The radiative information ... -
Prandtl Number Effect on the Laminar Convective Heat Transfer From a Rotating Disk
(The American Society of Mechanical Engineers (ASME), 2017)Convective heat transfer in rotating disk systems is of great importance in many engineering applications. Despite the high practical relevance, there have been only a small number of experimental investigations regarding ... -
Thermoeconomic Optimization and Comparison of Plate-Fin Heat Exchangers Using Louver, Offset Strip, Triangular and Rectangular Fins Applied in 200 kW Microturbines
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, four types of plate-fin heat exchangers applied in 200 kW microturbines are investigated. Multi-objective optimization algorithm, NSGA-II (nondominated sorting genetic algorithm (GA)), is employed to maximize ... -
Solution of the Graetz–Nusselt Problem for Liquid Flow Over Isothermal Parallel Ridges
(The American Society of Mechanical Engineers (ASME), 2017)We consider convective heat transfer for laminar flow of liquid between parallel plates that are textured with isothermal ridges oriented parallel to the flow. Three different flow configurations are analyzed: one plate ... -
Heat Transfer and Fluid Flow Characteristics in a Sessile Droplet on Oil-Impregnated Surface Under Thermal Disturbance
(The American Society of Mechanical Engineers (ASME), 2017)The present study examines the flow field and heat transfer inside a sessile droplet on oil-impregnated surface when subjected to a small temperature difference at the droplet–oil interface. Temperature and flow fields ... -
Experimental Investigation of Convection Heat Transfer in High Pressure and High Temperature Gas Flows
(The American Society of Mechanical Engineers (ASME), 2017)This work focuses on an experimental investigation of convection heat transfer to a gas in a vertical tube under strongly heated conditions at high temperatures and pressures up to 943 K and 65 bar. A unique test facility ... -
A Comprehensive Experimental Investigation of the Performance of Closed-Loop Pulsating Heat Pipes
(The American Society of Mechanical Engineers (ASME), 2017)Closed-loop pulsating heat pipes (CLPHPs) are a new type of two-phase heat transfer devices that can transfer considerable heat in a small space via two-phase vapor and liquid pulsating flow and work with various types of ... -
Thermoacoustic Oscillations in Multipath Heated Fuel Circuits
(The American Society of Mechanical Engineers (ASME), 2017)Pressure oscillations in supercritical jet-A fuel flowing through four parallel heated tubes connected to common manifolds have been observed in this study. Tests were performed with fuel inlet temperatures ranging from ... -
Theoretical Adjustment of Necessary Conditions for Enhancing Figure of Merit of Thin Thermoelectric Layers
(The American Society of Mechanical Engineers (ASME), 2017)This work presents a simple method based on electrical and thermal properties of materials. It permits researchers, in the field of manufacturing and characterization of thin and thick films in solid state to take appropriate ... -
An Investigation of Heat Transfer in a Cavity Flow in the Noncontinuum Regime
(The American Society of Mechanical Engineers (ASME), 2017)Volume diffusion (or bi-velocity) continuum model offers an alternative modification to the standard Navier–Stokes for simulating rarefied gas flows. According to this continuum model, at higher Knudsen numbers the ... -
Entropy Generation Analysis in Nonlinear Convection Flow of Thermally Stratified Fluid in Saturated Porous Medium With Convective Boundary Condition
(The American Society of Mechanical Engineers (ASME), 2017)This article emphasizes the significance of entropy generation analysis and nonlinear temperature density relation on thermally stratified viscous fluid flow over a vertical plate embedded in a porous medium with a thermal ... -
Numerical Investigation on Diffusion Slot Hole With Various Cross-Sectional End Shapes
(The American Society of Mechanical Engineers (ASME), 2017)The diffusion hole constructed on a slot-type cross section has the potential to obtain high film cooling performance. However, the end shape of the cross section can greatly affect film cooling characteristics. This study ... -
A Note on the Generalized Thermoelasticity Theory With Memory-Dependent Derivatives
(The American Society of Mechanical Engineers (ASME), 2017)In this note, two aspects in the theory of heat conduction model with memory-dependent derivatives (MDDs) are studied. First, the discontinuity solutions of the memory-dependent generalized thermoelasticity model are ... -
Pore Scale Investigation of Heat Conduction of High Porosity Open-Cell Metal Foam/Paraffin Composite
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, a numerical model employing an approximately realistic three-dimensional (3D) foam structure represented by Weaire–Phelan foam cell is developed to study the steady-state heat conduction of high porosity ... -
General Characterization of Jet Impingement Array Heat Sinks With Interspersed Fluid Extraction Ports for Uniform High-Flux Cooling
(The American Society of Mechanical Engineers (ASME), 2017)In conventional jet impingement array heat sinks, all the spent coolant is extracted from component edges, resulting in cross-flow interference and nonuniform heat transfer. Jet impingement arrays with interspersed fluid ... -
A Numerical Study of Developing Buoyancy-Assisted Mixed Convection With Spatially Periodic Wall Heating
(The American Society of Mechanical Engineers (ASME), 2017)The validity of a parabolic model for simulating the developing buoyancy-assisted mixed convection flow in a vertical channel with spatially periodic wall temperature is verified by a full elliptic model of the momentum ... -
Computational Fluid Dynamics Analysis of the Transient Cooling of the Boiling Surface at Bubble Departure
(The American Society of Mechanical Engineers (ASME), 2017)Component-scale computational fluid dynamics (CFD) modeling of boiling via heat flux partitioning relies upon empirical and semimechanistic representations of the modes of heat transfer believed to be important. One such ...