Journal of Heat Transfer: Recent submissions
Now showing items 1401-1420 of 3611
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Accelerated Cryogenic Cooling Caused by the Temporary Frost Layer Enhancer
(The American Society of Mechanical Engineers (ASME), 2017)The possibility of using a frost layer, created on the surface of a sample that undergoes cryogenic treatment, as a heat transfer enhancer was recently studied. This layer grows on the preliminary cooled sample surface as ... -
Air-Side Heat Transfer Enhancement Utilizing Design Optimization and an Additive Manufacturing Technique
(The American Society of Mechanical Engineers (ASME), 2017)This paper focuses on the study of an innovative manifold microchannel design for air-side heat transfer enhancement that uses additive manufacturing (AM) technology. A numerical-based multi-objective optimization was ... -
Temperature-Dependent Thermal Boundary Conductance at Metal/Indium-Based III–V Semiconductor Interfaces
(The American Society of Mechanical Engineers (ASME), 2017)At the microscale length and smaller, solid–solid interfaces pose a significant contribution to resistance, resulting in a build-up of energy carriers, in turn leading to extreme temperature gradients within a single ... -
Determination of Metal/Die Interfacial Heat Transfer Coefficients in Squeeze Casting of Wrought Aluminum Alloy 7075 With Variations in Section Thicknesses and Applied Pressures
(The American Society of Mechanical Engineers (ASME), 2017)Squeeze casting of wrought aluminum 7075 was carried out on a 75-ton hydraulic press. Metal/die interface heat transfer phenomena in squeeze casting of the alloy were investigated. To facilitate experimental measurements, ... -
Buoyancy Effect on the Flow Pattern and the Thermal Performance of an Array of Circular Cylinders
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, we found, by means of numerical simulations, a transition in the oscillatory character of the flow field for a particular combination of buoyancy and spacing in an array of six circular cylinders at a Reynolds ... -
Performance Definitions for Three-Fluid Heat and Moisture Exchangers
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents performance definitions for calculating the overall effectiveness of three-fluid heat and moisture exchangers. The three-fluid heat and moisture exchanger considered in this paper is a combination of a ... -
Influence of Gravitational Modulation on Natural Convection in a Horizontal Porous Annulus
(The American Society of Mechanical Engineers (ASME), 2017)The influence of gravitational modulation on natural convection in a horizontal porous annulus is investigated in this paper. The mathematical model describing the phenomenon consists of the heat equation coupled by the ... -
Effect of Particle Size and Aggregation on Thermal Conductivity of Metal–Polymer Nanocomposite
(The American Society of Mechanical Engineers (ASME), 2017)Metal nanoparticle has been a promising option for fillers in thermal interface materials due to its low cost and ease of fabrication. However, nanoparticle aggregation effect is not well understood because of its complexity. ... -
Effects of Averaging the Heat Transfer Coefficient on Predicted Material Temperature and Its Gradient
(The American Society of Mechanical Engineers (ASME), 2017)The heat transfer coefficient (HTC) is often averaged spatially when designing heat exchangers. Since the HTC could vary appreciably about a heat transfer enhancement feature such as a pin fin or a rib, it is of interest ... -
Heat Transfer and Entropy Generation Characteristics of a Non-Newtonian Fluid Squeezed and Extruded Between Two Parallel Plates
(The American Society of Mechanical Engineers (ASME), 2017)This study investigates the unsteady heat transfer and entropy generation characteristics of a non-Newtonian fluid, squeezed and extruded between two parallel plates. In an effort to capture the underlying thermo-hydrodynamics, ... -
Influence of Coolant Jet Pulsation on the Convective Film Cooling of an Adiabatic Wall
(The American Society of Mechanical Engineers (ASME), 2017)This study investigates the effects of sinusoidal pulsations externally imposed to an oblique round jet. The effectiveness of film coverage of an adiabatic wall onset for a thermally uniform bulk flow is presented in the ... -
3D Printing of Spark-Ignited Flame Kernels, Experimentally Captured by 3D-Computer Tomography and Multi-Directional Schlieren Photography
(The American Society of Mechanical Engineers (ASME), 2017)Non-scanning 3D-CT(Computer Tomography) technique employing a multi-directional quantitative schlieren photographic system with flash light source, has been performed to obtain instantaneous density distributions of ... -
Experimental and Numerical Visualization of Droplet-Induced Crown Splashing Dynamics
(The American Society of Mechanical Engineers (ASME), 2017)The objective of this study was to visualize the droplet-induced crown splashing dynamics at high spatial and temporal resolutions. In this work, the effects of droplet train impingement on crown splashing dynamics were ... -
Direct Numerical Simulation and RANS Comparison of Turbulent Convective Heat Transfer in a Staggered Ribbed Channel With High Blockage
(The American Society of Mechanical Engineers (ASME), 2017)A turbulent convective flow of an incompressible fluid inside a staggered ribbed channel with high blockage at ReH ≈ 4200 is simulated with direct numerical simulation (DNS) and Reynolds-averaged Navier–Stokes (RANS) ... -
Droplets Jumping from a Hybrid Superhydrophilic and Superhydrophobic Surface
(The American Society of Mechanical Engineers (ASME), 2017)The wetting condition effect of the condensation process on a hybrid superhydrophobic and superhydrophilic copper surface as shown in Fig. 1a was experimentally investigated. The superhydrophilic surface (Fig. 1b) consists ... -
Quantitative Evaluation of the Dependence of Pool Boiling Heat Transfer Enhancement on Sintered Particle Coating Characteristics
(The American Society of Mechanical Engineers (ASME), 2017)Immersion cooling strategies often employ surface enhancements to improve the pool boiling heat transfer performance. Sintered particle/powder coatings have been commonly used on smooth surfaces to reduce the wall superheat ... -
Flow Visualization inside Thermosyphon for Measuring Heat Transfer Limit
(The American Society of Mechanical Engineers (ASME), 2017)Heat pipe is a highly effective passive heat transfer device using phase change within small temperature difference. It is noted that heat pipe should be operated under heat transfer limit for practical heat pipe heat ... -
Visual Onset of Nucleate Boiling in Water Spray Cooling on Hot Steel Plate
(The American Society of Mechanical Engineers (ASME), 2017)The onset of nucleate boiling in water spray cooling on hot steel plate was investigated by a simultaneous boiling visualization and heat transfer measurement. The boiling phenomena were visualized with 4K video camera and ... -
Numerical Simulation of Condensation for R410A in Horizontal Round and Flattened Minichannels
(The American Society of Mechanical Engineers (ASME), 2017)Heat transfer characteristics for condensation for R410A inside horizontal round (dh = 3.78 mm) and flattened tubes (aspect ratio (AR) = 3.07, 4.23, and 5.39) with larger horizontal than vertical dimensions at a saturation ... -
Homotopy Perturbation Method for the Analysis of Heat Transfer in an Annular Fin With Temperature-Dependent Thermal Conductivity
(The American Society of Mechanical Engineers (ASME), 2017)A recent mathematical technique of homotopy perturbation method (HPM) for solving nonlinear differential equations has been applied in this paper for the analysis of steady-state heat transfer in an annular fin with ...