Journal of Heat Transfer: Recent submissions
Now showing items 2121-2140 of 3611
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Pool Boiling Heat Transfer Characteristics of HFO 1234yf on Plain and Microporous Enhanced Surfaces
(The American Society of Mechanical Engineers (ASME), 2013)This study characterizes the pool boiling performance of HFO1234yf (hydrofluoroolefin 2,3,3,3tetrafluoropropene). HFO1234yf is a new, environmentally friendly refrigerant likely to replace HFC134a in automotive airconditioning ... -
Combined Spectral Perturbation Approach for Systematic Mode Selection in Thermal Convection
(The American Society of Mechanical Engineers (ASME), 2013)A nonlinear spectral approach is proposed to simulate the post critical convective state for thermogravitational instability in a Newtonian fluid layer heated from below. The spectral methodology consists of expanding the ... -
Topology Optimization for an Internal Heat Conduction Cooling Scheme in a Square Domain for High Heat Flux Applications
(The American Society of Mechanical Engineers (ASME), 2013)Conductive heat transfer is of importance in the cooling of electronic equipment. However, in order for conductive cooling to become effective, the use of highconducting materials and the correct distribution thereof is ... -
Parametric Study of the Effect of the Vapor Chamber Characteristics on Its Performance
(The American Society of Mechanical Engineers (ASME), 2013)In this work, the effect of vapor chamber characteristics, the properties of its working fluid and the operating parameters on the vapor chamber performance are studied. Also, the effects of these parameters on the cooling ... -
Steady and Unsteady Air Impingement Heat Transfer for Electronics Cooling Applications
(The American Society of Mechanical Engineers (ASME), 2013)This paper focuses on two forced convection methods—steady jet flow and pulsating flow by synthetic jets—that can be used in applications requiring significant amounts of heat removal from electronics components. Given ... -
Lattice Boltzmann Simulation of Heat Transfer Enhancement in a Cold Plate Using Porous Medium
(The American Society of Mechanical Engineers (ASME), 2013)The computational study of heat transfer and fluid flow in a porous media cold plate was investigated using lattice Boltzmann method. The study was carried out on a heat exchanger including two adiabatic inlet and outlet ... -
High Heat Flux Cooling of Electronics: The Need for a Paradigm Shift
(The American Society of Mechanical Engineers (ASME), 2013)In a discussion initiated by the German Research Foundation (DFG) about cooling of electronics, two aspects turned out to be important: The need for a paradigm shift from an “add on†to an “integrated multidisciplinary†... -
Scaling of Convective Heat Transfer Enhancement Due to Flow Pulsation in an Axisymmetric Impinging Jet
(The American Society of Mechanical Engineers (ASME), 2013)Impinging jets are widely used to achieve a high local convective heat flux, with applications in high power density electronics and various other industrial fields. The heat transfer to steady impinging jets has been ... -
Operational Limitations of Heat Pipes With Silver Water Nanofluids
(The American Society of Mechanical Engineers (ASME), 2013)The paper presents the enhancement in the operational limits (boiling, entrainment, sonic, viscous and capillary limits) of heat pipes using silver nanoparticles dispersed in deionized (DI) water. The tested nanoparticles ... -
Enhanced Pool Boiling With Ethanol at Subatmospheric Pressures for Electronics Cooling
(The American Society of Mechanical Engineers (ASME), 2013)The growing trend in miniaturization of electronics has generated a need for efficient thermal management of these devices. Boiling has the ability to dissipate a high heat flux while maintaining a small temperature ... -
Modeling and Optimization of Superhydrophobic Condensation
(The American Society of Mechanical Engineers (ASME), 2013)Superhydrophobic micro/nanostructured surfaces for dropwise condensation have recently received significant attention due to their potential to enhance heat transfer performance by shedding water droplets via coalescenceinduced ... -
Design and Evaluation of a MEMS Based Stirling Microcooler
(The American Society of Mechanical Engineers (ASME), 2013)A new Stirling microrefrigeration system composed of arrays of silicon MEMS cooling elements has been designed and evaluated. The cooling elements are to be fabricated in a stacked array on a silicon wafer. A regenerator ... -
Thermal Analysis of AlGaN/GaN HEMTs Using Angular Fourier Series Expansion
(The American Society of Mechanical Engineers (ASME), 2013)Thermal analysis of planar and nearsquare semiconductor device chips employing angular Fourierseries (AFS) expansion is presented for the first time. The determination of the device peak temperature using AFS requires only ... -
Foreword
(The American Society of Mechanical Engineers (ASME), 2013)We take immense pleasure in taking out a special issue on recent works on high heat flux cooling of electronics. Research on high heat flux electronic cooling has gathered momentum and has been developed as a highly ... -
Performance of an Air Cooled Heat Sink Channel With Microscale Dimples Under Transitional Flow Conditions
(The American Society of Mechanical Engineers (ASME), 2013)The objective of this effort is to pursue artificial microscale surface roughness features in the form of dimples, on the walls of an aircooled heat sink channel, as a passive option to energyefficiently augment heat ... -
Closed Form Analytical Solutions for Laminar Natural Convection on Horizontal Plates
(The American Society of Mechanical Engineers (ASME), 2013)A boundary layer based integral analysis has been performed to investigate laminar natural convection heat transfer characteristics for fluids with arbitrary Prandtl number over a semiinfinite horizontal plate subjected ... -
Investigation of Double Diffusive Natural Convection in Presence of Gray Gas Radiation Within a Square Cavity Using Multiple Relaxation Time Lattice Boltzmann Method
(The American Society of Mechanical Engineers (ASME), 2013)The present work proposes a coupling between the hybrid lattice Boltzmann, the finite difference method, and the discrete ordinates method to simulate combined double diffusive convection and volumetric radiation in a ... -
Three Dimensional Stagnation Flow and Heat Transfer of a Viscous, Compressible Fluid on a Flat Plate
(The American Society of Mechanical Engineers (ASME), 2013)The steadystate threedimensional flow and heat transfer of a viscous, compressible fluid in the vicinity of stagnation point region on a flat plate with constant wall temperature is investigated by similarity solution ... -
Uniform Solution on the Combined Effect of Magnetic Field and Internal Heat Generation on Rayleigh–Bأ©nard Convection in Micropolar Fluid
(The American Society of Mechanical Engineers (ASME), 2013)Combined effect of magnetic field and internal heat generation on the onset of Rayleigh–Bأ©nard convection in a horizontal micropolar fluid layer is studied. The bounding surfaces of the liquids are considered to be ... -
Turbulent Heat Transfer From a Slot Jet Impinging on a Flat Plate
(The American Society of Mechanical Engineers (ASME), 2013)The flow field and heat transfer of a plane impinging jet on a hot moving wall were investigated using one point closure turbulence model. Computations were carried out by means of a finite volume method. The evolutions ...