Journal of Heat Transfer: Recent submissions
Now showing items 921-940 of 3611
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Flow Patterns During Flow Boiling Instability in Silicon-Based Pin-Fin Microchannels
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, the flow patterns during water flow boiling instability in pin-fin microchannels were experimentally studied. Three types of pin-fin arrays (in-line/circular pin-fins, staggered/circular pin-fins, and ... -
Lattice Boltzmann Simulation of Mass Transfer Coefficients for Chemically Reactive Flows in Porous Media
(The American Society of Mechanical Engineers (ASME), 2018)We present lattice Boltzmann (LB) simulations for the mass transfer coefficient from bulk flows to pore surfaces in chemically reactive flows for both ordered and disordered porous structures. The ordered porous structure ... -
Numerical Study of Impingement Cooling of Aviation Kerosene at Supercritical Conditions
(The American Society of Mechanical Engineers (ASME), 2018)In the present paper, numerical study of flow and heat transfer properties of RP-3 kerosene at liquid and supercritical conditions in an impingement model is conducted with renormalization group (RNG) k−ε turbulence model ... -
Droplet Cloaking Imaging and Characterization
(The American Society of Mechanical Engineers (ASME), 2018)Lubricant infused surfaces (LIS or SLIPS) have potential to enhance a variety of applications due to their non-wetting characteristics. Recently, LIS and SLIPS have been shown to greatly improve dropwise condensation heat ... -
Modeling Effective Thermal Conductivity of Thermal Radiation for Nuclear Packed Pebble Beds
(The American Society of Mechanical Engineers (ASME), 2018)In nuclear packed pebble beds, it is a fundamental task to model effective thermal conductivity (ETC) of thermal radiation. Based on the effective heat transfer cells of structured packing, a short-range radiation model ... -
Particle-Scale Investigation of Thermal Radiation in Nuclear Packed Pebble Beds
(The American Society of Mechanical Engineers (ASME), 2018)For the heat transfer of pebble or granular beds (e.g., high temperature gas-cooled reactors (HTGR)), the particle thermal radiation is an important part. Using the subcell radiation model (SCM), which is a generic theoretical ... -
Tuning Superhydrophilic Nanostructured Surfaces to Maximize Water Droplet Evaporation Heat Transfer Performance
(The American Society of Mechanical Engineers (ASME), 2018)Spraying water droplets on air fin surfaces is often used to augment the performance of air-cooled Rankine power plant condensers and wet cooling tower heat exchangers for building air-conditioning systems. To get the best ... -
Controlling the Contact Times of Bouncing Droplets: Droplet Impact on Vibrating Surfaces
(The American Society of Mechanical Engineers (ASME), 2018)Droplet impact on vibrating solids is ubiquitous in nature and industrial applications, including impact on turbine blades, insect wings, or during spray cooling of electronic systems and steel manufacturing processes. ... -
Numerical Investigation of Flow Structure and Heat Transfer Produced by a Single Highly Confined Bubble in a Pressure-Driven Channel Flow
(The American Society of Mechanical Engineers (ASME), 2018)A numerical investigation of a single highly confined bubble moving through a millimeter-scale channel in the absence of phase change is presented. The simulation includes thermal boundary conditions designed to match those ... -
Turbine Blade Leading Edge Cooling With One Row of Normal or Tangential Impinging Jets
(The American Society of Mechanical Engineers (ASME), 2018) -
Experimental Analysis of the Impact of Nanoinclusions and Surfactants on the Viscosity of Paraffin-Based Energy Storage Materials
(The American Society of Mechanical Engineers (ASME), 2018)Phase change materials (PCMs) are commonly used in many applications, including the transient thermal management of electronics. For many systems, paraffin-based PCMs are used with suspended nanoinclusions to increase their ... -
Numerical Study of Heat Transfer Enhancement of Roll-to-Roll Microchannel Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2018)The heat transfer performance of two roll-to-roll microchannel heat exchangers with square cross section and side length ranging from 0.2 mm to 0.5 mm were investigated via numerical studies. In order to assess the heat ... -
Effects of Surface Roughness and Bend Geometry on Mass Transfer in an S-Shaped Back to Back Bend at Reynolds Number of 200,000
(The American Society of Mechanical Engineers (ASME), 2018)Experiments were performed to investigate the local development of roughness and its effect on mass transfer in an S-shaped bend at Reynolds number of 200,000. The tests were performed over four consecutive time periods ... -
Transient Heat Conduction in a Thin Layer Between Semi-Infinite Media in Polymer Shaping
(The American Society of Mechanical Engineers (ASME), 2018)A series expansion and an approximation have been derived for the temperature in the general case of transient heat conduction in a thin layer with a surface heat flux between two semi-infinite media at different uniform ... -
Fuzzy Identification of the Time- and Space-Dependent Internal Surface Heat Flux of Slab Continuous Casting Mold
(The American Society of Mechanical Engineers (ASME), 2018)To identify the transient and distributed internal surface heat flux of the slab mold in continuous casting process, a fuzzy inference method is proposed in this work. For temporal and spatial distribution characteristics ... -
Mixed H1 and H2 Forced Convection in a Rectangular Duct
(The American Society of Mechanical Engineers (ASME), 2018)The constant flux forced convection in a rectangular duct with two highly conductive (H1) walls and two poorly conductive (H2) walls is studied for the first time. This mixed problem is solved analytically using a modified ... -
Forced and Mixed Convection Heat Transfer at High Pressure and High Temperature in a Graphite Flow Channel
(The American Society of Mechanical Engineers (ASME), 2018)High pressure/high temperature forced and mixed convection experiments have been performed with helium and nitrogen at temperatures and pressures up to 893 K and 64 bar, respectively. The test section had a 16.8 mm ID flow ... -
Heat Flux Vector Potential in Convective Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2018)The heat function concept introduced by Kimura and Bejan (1983, “The Heatline Visualization of Convective Heat Transfer,” ASME J. Heat Transfer, 105(4), pp. 916–919) for two-dimensional (2D) heat transfer is being extended ... -
Experimental Investigation of Flow Laminarization in a Graphite Flow Channel at High Pressure and High Temperature
(The American Society of Mechanical Engineers (ASME), 2018)Hot wire anemometer (HWA) measurements of turbulent gas flow have been performed in upward forced convection experiments at pressures ranging from 0.6 MPa to 6.3 MPa and fluid temperatures ranging from 293 K to 673 K. The ... -
High Temperature Thermal Decomposition of Diethyl Carbonate by Pool Film Boiling
(The American Society of Mechanical Engineers (ASME), 2018)We use the configuration of film boiling on a horizontal tube positioned in a stagnant pool of saturated diethyl carbonate (DEC, (C2H5O)2CO) to study DEC decomposition at temperatures up to 1500 K. The composition of bubbles ...