Journal of Heat Transfer: Recent submissions
Now showing items 2521-2540 of 3611
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Supercritical Carbon Dioxide Heat Transfer in Horizontal Semicircular Channels
(The American Society of Mechanical Engineers (ASME), 2012)Competitive cycles must have a minimal initial cost and be inherently efficient. Currently, the supercritical carbon dioxide (S-CO2 ) Brayton cycle is under consideration for these very reasons. ... -
Experimental Investigation of Flow Boiling Instability in a Single Horizontal Microtube With and Without Inlet Restriction
(The American Society of Mechanical Engineers (ASME), 2012)An experimental study is conducted to investigate the effects of inlet restriction (orifice) on flow boiling instability in a single horizontal microtube. The test-section is composed of a ... -
Volumetric Heat Capacity Enhancement in Thin Films of Amorphous Fluorocarbon Polymers
(The American Society of Mechanical Engineers (ASME), 2012)Plasma deposited amorphous fluorocarbon polymers find use in biopassivation, and as low-friction coatings, adhesion promoters, and interlayer dielectrics. Here, we exploit their ease of deposition ... -
Unsteady Wake and Coolant Density Effects on Turbine Blade Film Cooling Using Pressure Sensitive Paint Technique
(The American Society of Mechanical Engineers (ASME), 2012)The effect of an unsteady stator wake (simulated by wake rods mounted on a spoke-wheel wake generator) on the modeled rotor blade is studied using the pressure sensitive paint (PSP) mass-transfer ... -
Turbulent Heat and Mass Transfer Across a Hollow Fiber Membrane Tube Bank in Liquid Desiccant Air Dehumidification
(The American Society of Mechanical Engineers (ASME), 2012)The fluid flow and conjugate heat and mass transfer across a hollow fiber membrane tube bundle used for liquid desiccant air dehumidification are investigated. In this process, humid air flows ... -
Optimum Geometry of Plate Fins
(The American Society of Mechanical Engineers (ASME), 2012)A method and practical results are presented for finding the geometries of fixed volume plate fins for maximizing dissipated heat flux. The heat transfer theory used in optimization is based ... -
Critical Heat Flux in Submerged Jet Impingement Boiling of Water Under Subatmospheric Conditions
(The American Society of Mechanical Engineers (ASME), 2012)Critical heat flux (CHF) characteristics in submerged jet impingement boiling of water on a heated copper surface are investigated at subatmospheric conditions. Data are reported at a fixed ... -
View Factors of Samples Tested in Cone and Cylinder Calorimeters
(The American Society of Mechanical Engineers (ASME), 2012)Cone and cylinder calorimeters are devices used to determine flammability characteristics of solid materials under prescribed heat inputs. Temperature and heat input distribution on the exposed ... -
Solving Fully Three-Dimensional Microscale Dual Phase Lag Problem Using Mixed-Collocation, Finite Difference Discretization
(The American Society of Mechanical Engineers (ASME), 2012)In the present work, we investigate laser heating of nanoscale thin-films irradiated in three dimensions using the dual phase lag (DPL) model. A numerical solution based on mixed-collocation, ... -
Near-Field Radiative Transfer Between Heavily Doped SiGe at Elevated Temperatures
(The American Society of Mechanical Engineers (ASME), 2012)SiGe alloys represent an important type of high-temperature semiconductor material for solid-state energy conversion. In the present study, the near-field radiative heat transfer between heavily ... -
Onset of Convection in a Horizontal Porous Layer Saturated by a Power-Law Fluid
(The American Society of Mechanical Engineers (ASME), 2012)This paper investigates the onset of motion, and the subsequent finite-amplitude convection, in a shallow porous cavity filled with a non-Newtonian fluid. A power-law model is used to characterize ... -
Oscillation and Chaos in Combined Heat Transfer by Natural Convection, Conduction, and Surface Radiation in an Open Cavity
(The American Society of Mechanical Engineers (ASME), 2012)Combined heat transfer by natural convection, conduction, and surface radiation in an open cavity is solved numerically by employing SIMPLE algorithm with QUICK scheme. The unsteady-state flow ... -
Impact of Particulate Deposition on the Thermohydraulic Performance of Metal Foam Heat Exchangers: A Simplified Theoretical Model
(The American Society of Mechanical Engineers (ASME), 2012)Assuming uniform particulate deposit layer, with deposition layer thickness in the range of 10–400 μm, on the ligaments of a metal foam heat sink, the effects of airborne particle deposition ... -
Measuring the Thermal Conductivity of Flowing Liquid Samples Using the Three Omega Method
(The American Society of Mechanical Engineers (ASME), 2012)The thermal conductivity of a liquid is generally measured under conditions that suppress bulk flow in the sample. However, in situ measurement of the thermal conductivity of a flowing liquid ... -
Chebyshev Collocation Spectral Method for Three-Dimensional Transient Coupled Radiative–Conductive Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2012)A Chebyshev collocation spectral method (CSM) is presented to solve transient coupled radiative and conductive heat transfer in three-dimensional absorbing, emitting, and scattering medium in ... -
PHOTOGALLERY HEAT AND MASS TRANSFER VISUALIZATION
(The American Society of Mechanical Engineers (ASME), 2012) -
Effect of Rib Spacing on Heat Transfer in a Two Pass Rectangular Channel (AR = 2:1) at High Rotation Numbers
(The American Society of Mechanical Engineers (ASME), 2012)In this paper, the effect of rib spacing on heat transfer in a rotating two-passage channel (aspect ratio, AR = 2:1) at orientation angle of 135 deg was studied. Parallel ribs were applied’ ... -
Numerical Study of Flow Deflection and Horseshoe Vortices in a Louvered Fin Round Tube Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2012)In louvered fin heat exchangers, the flow deflection influences the heat transfer rate and pressure drop and thus the heat exchanger’s performance. To date, studies of the flow deflection are ... -
A Theoretical and Experimental Investigation of Unidirectional Freezing of Nanoparticle-Enhanced Phase Change Materials
(The American Society of Mechanical Engineers (ASME), 2012)Highly-conductive nanostructures may be dispersed into phase change materials (PCM) to improve their effective thermal conductivity, thus leading to colloidal systems that are referred to as ... -
Effects of Stone-Wales Defects on the Thermal Conductivity of Carbon Nanotubes
(The American Society of Mechanical Engineers (ASME), 2012)The thermal conductivity of carbon nanotubes with Stone-Wales (SW) defects was investigated using non-equilibrium molecular dynamics method. The defect effects were analyzed by the temperature ...