Journal of Heat Transfer: Recent submissions
Now showing items 2421-2440 of 3611
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Heterogeneity and Onset of Instability in Darcy’s Flow With a Prescribed Horizontal Temperature Gradient
(The American Society of Mechanical Engineers (ASME), 2012)The aim of this study is the analysis of the onset conditions for the thermal instability in a fluid saturated porous medium. The investigation refers to an infinitely wide horizontal porous ... -
Transient Free Convection Flow Past an Infinite Moving Vertical Cylinder in a Stably Stratified Fluid
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents an analytical treatment for the unsteady one-dimensional natural convective flow past an infinite moving vertical cylinder in the presence of thermal stratification. Exact ... -
Excitation of Single Phonon Modes in Nanoscale Waveguides
(The American Society of Mechanical Engineers (ASME), 2012)We present a new computational method that excites guided phonon modes in nanoscale waveguides at a specific frequency and wavenumber. The method uses nonequilibrium molecular dynamics and Fourier ... -
Gaseous Conductivity Study on Silica Aerogel and Its Composite Insulation Materials
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents a theoretical and experimental study on gaseous conductivity of silica aerogel and composite insulation materials. First, the insulation material samples (including silica ... -
Influence of Nanomaterials in Polymer Composites on Thermal Conductivity
(The American Society of Mechanical Engineers (ASME), 2012)Carbon nanotube- or/and graphite-filled polymer composites were synthesized by using simple mixing and drying methods, and their thermal conductivities and structures were characterized by using a ... -
Heat Transfer Across Metal-Dielectric Interfaces During Ultrafast-Laser Heating
(The American Society of Mechanical Engineers (ASME), 2012)Heat transfer across metal-dielectric interfaces involves transport of electrons and phonons accomplished either by coupling between phonons in metal and dielectric or by coupling between electrons ... -
Spanwise Heat Transport in Turbulent Channel Flow With Prandtl Numbers Ranging From 0.025 to 5.0
(The American Society of Mechanical Engineers (ASME), 2012)The near-wall turbulent heat transport of the three orthogonal directions was directly solved for the Prandtl numbers ranging from 0.025 to 5.0 to validate the algebraic models of the turbulent ... -
Reduced Order Thermal Modeling of Data Centers via Distributed Sensor Data
(The American Society of Mechanical Engineers (ASME), 2012)In this paper, an effective and computationally efficient proper orthogonal decomposition (POD) based reduced order modeling approach is presented, which utilizes selected sets of observed thermal ... -
Prediction of the Thermal Conductivity of ZnO Nanostructures
(The American Society of Mechanical Engineers (ASME), 2012)The kinetic theory of gas is used to predict the specific heat and thermal conductivity of ZnO nanostructures. In this model, phonons are considered as a gas whose basic properties are given ... -
Comparison Between Thermal Conductivity Models on Heat Transfer in Power-Law Non-Newtonian Fluids
(The American Society of Mechanical Engineers (ASME), 2012)This paper endeavors to complete a numerical research on forced convection steady heat transfer in power-law non-Newtonian fluids in a circle duct. Incompressible, laminar fluids are to be studied ... -
Scaling Weld or Melt Pool Shape Affected by Thermocapillary Convection With High Prandtl Numbers
(The American Society of Mechanical Engineers (ASME), 2012)The molten pool shape and thermocapillary convection during melting or welding of metals or alloys are self-consistently predicted from scale analysis. Determination of the molten pool shape and ... -
Particle Migration by Optical Scattering Force in Microfluidic System With Light-Absorbing Liquid
(The American Society of Mechanical Engineers (ASME), 2012)Optical force offers a promise of being applied as a noninvasive manipulation tool for microscopic objects without physical contact. Particle control in a microfluidic system is achieved by ... -
Chemical Vapor Deposition Growth, Optical, and Thermal Characterization of Vertically Aligned Single-Walled Carbon Nanotubes
(The American Society of Mechanical Engineers (ASME), 2012)Vertically aligned single-walled carbon nanotubes (VA-SWNTs) is expected to be an extra-ordinal material for various optical, electrical, energy, and thermal devices. The recent progress in growth ... -
A Numerical Study of Concurrent Flame Propagation Over Methanol Pool Surface
(The American Society of Mechanical Engineers (ASME), 2012)Concurrent flame spread over methanol pool surface under atmospheric conditions and normal gravity has been numerically investigated using a transient, two-phase, reacting flow model. The average ... -
Numerical Predictions of Hydrogen-Air Rectangular Channel Flows Augmented by Catalytic Surface Reactions
(The American Society of Mechanical Engineers (ASME), 2012)Catalytic combustion of hydrogen-air boundary layers involves the adsorption of hydrogen and oxygen into a platinum-coated surface, chemical reactions of the adsorbed species, and the desorption ... -
Feedstock Diffusion and Decomposition in Aligned Carbon Nanotube Arrays
(The American Society of Mechanical Engineers (ASME), 2012)Feedstock diffusion and decomposition in the root growth of aligned carbon nanotube (CNT) arrays is discussed. A nondimensional modulus is proposed to differentiate catalyst poisoning controlled ... -
Numerical Analysis of Depollution of Smoke Produced by Household Wastes Incineration
(The American Society of Mechanical Engineers (ASME), 2012)This study reports the results on a numerical investigation of the depollution of smokes produced by the incineration of household wastes in a cylindrical furnace. Transfers are described by ... -
Effects of Surface Topography and Colloid Particles on the Evaporation Kinetics of Sessile Droplets on Superhydrophobic Surfaces
(The American Society of Mechanical Engineers (ASME), 2012)In this paper, the evaporation kinetics of microliter-sized sessile droplets of gold colloids (∼250 nm in particle diameters) was experimentally studied on micropatterned superhydrophobic surfaces, ... -
Thermal Management of On-Chip Hot Spot
(The American Society of Mechanical Engineers (ASME), 2012)The rapid emergence of nanoelectronics, with the consequent rise in transistor density and switching speed, has led to a steep increase in microprocessor chip heat flux and growing concern over ... -
Performance Simulations of a Gas Turbine Disk-Blade Assembly Employing Miniature Radially Rotating Heat Pipes
(The American Society of Mechanical Engineers (ASME), 2012)With a substantially increased gas inlet temperature in modern gas turbines, the cooling of turbine disks is becoming a challenging task. In order to reduce the temperature at the disk rim, ...