Journal of Heat Transfer: Recent submissions
Now showing items 2041-2060 of 3611
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Observations of the Critical Heat Flux Process During Pool Boiling of FC 72
(The American Society of Mechanical Engineers (ASME), 2014)Experimental work was undertaken to investigate the process by which poolboiling critical heat flux (CHF) occurs using an IR camera to measure the local temperature and heat transfer coefficients on a heated silicon surface. ... -
Molecular Dynamics Studies of Homogeneous and Heterogeneous Thermal Bubble Nucleation
(The American Society of Mechanical Engineers (ASME), 2014)Thermal bubble nucleation was studied using molecular dynamics for both homogeneous and heterogeneous argon systems using isothermalisobaric (NPT) and isothermalisostress (NPzzT) ensembles. Unlike results using NVE and NVT ... -
Natural Convection in a Vertical Slit Microchannel With Superhydrophobic Slip and Temperature Jump
(The American Society of Mechanical Engineers (ASME), 2014)Recent developments in microscale heat exchangers have heightened the need for the understanding of fluid flow and heat transfer in a microchannel. In this study, we look into fullydeveloped buoyancydriven flow in a vertical ... -
In Memoriam
(The American Society of Mechanical Engineers (ASME), 2014)Dr. Zuber was a Montenegrin born in the Moskva Hotel in Belgrade, Yugoslavia, on Dec. 4, 1922. Prior to his immigration to the United States, Novak was a member of theBalkan AirForce, an Allied air formation composed of ... -
Analysis of the Transient Hot Wire Method to Measure Thermal Conductivity of Silica Aerogel: Influence of Wire Length, and Radiation Properties
(The American Society of Mechanical Engineers (ASME), 2014)When the transient hotwire method is used to measure the thermal conductivity of very low thermal conductivity silica aerogel (in the range of 10 mW/mآ·K at 1 atm) end effects due to the finite wire size and radiation ... -
Thermal Conductivity Enhancement of Ethylene Glycol Based Suspensions in the Presence of Silver Nanoparticles of Various Shapes
(The American Society of Mechanical Engineers (ASME), 2014)In this technical brief, the effect of adding silver (Ag) nanoparticles of various shapes on the thermal conductivity enhancement of ethylene glycol (EG)based suspensions was investigated experimentally. These included Ag ... -
Algebraic Anisotropic Turbulence Modeling of Compound Angled Film Cooling Validated by Particle Image Velocimetry and Pressure Sensitive Paint Measurements
(The American Society of Mechanical Engineers (ASME), 2014)The complex structures in the film cooling flow field of gas turbines lead to the anisotropic property of the turbulent eddy viscosity and scalar diffusivity. An algebraic anisotropic turbulence model is developed aiming ... -
Gaseous Slip Flow Mixed Convection in Vertical Microducts With Constant Axial Energy Input
(The American Society of Mechanical Engineers (ASME), 2014)The present investigation is devoted to the fully developed slip flow mixed convection in vertical microducts of two different cross sections, namely, polygon, with circle as a limiting case, and rectangle. The two axially ... -
A Reexamination of Phonon Transport Through a Nanoscale Point Contact in Vacuum
(The American Society of Mechanical Engineers (ASME), 2014)Using a silicon nitride cantilever with an integral silicon tip and a microfabricated platinum–carbon resistance thermometer located close to the tip, a method is developed to concurrently measure both the heat transfer ... -
Effect of Gravity Modulation on Electrothermal Convection in a Dielectric Fluid Saturated Anisotropic Porous Layer
(The American Society of Mechanical Engineers (ASME), 2014)This paper deals with linear and nonlinear stability analyses of thermal convection in a dielectric fluid saturated anisotropic Brinkman porous layer subject to the combined effect of AC electric field and timeperiodic ... -
Heat Transfer in Porous Graphite Foams
(The American Society of Mechanical Engineers (ASME), 2014)Measured values of heat transfer and pressure loss are presented for a variety of porous graphite foams in subsonic turbulent airflow. These foams were developed over the last decade to find combinations of high conductivity, ... -
Temperature Rise in Electroosmotic Flow of Typical Non Newtonian Biofluids Through Rectangular Microchannels
(The American Society of Mechanical Engineers (ASME), 2014)Electroosmosis is the main mechanism for flow generation in labonachip (LOC) devices. The temperature rise due to the Joule heating phenomenon, associated with the electroosmosis, may be detrimental for samples being ... -
Instantaneous Heat Flux Simulation of a Motored Reciprocating Engine: Unsteady Thermal Boundary Layer With Variable Turbulent Thermal Conductivity
(The American Society of Mechanical Engineers (ASME), 2014)Due to the inherently unsteady environment of reciprocating engines, unsteady thermal boundary layer modeling may improve the reliability of simulations of internal combustion engine heat transfer. Simulation of the unsteady ... -
Unsteady Convection Flow of Some Nanofluids Past a Moving Vertical Flat Plate With Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2014)This paper is devoted to the study of heat and mass transfer characteristics of some nanofluid flows past an infinite flat plate moving vertically. Some waterbased nanofluids containing copper (Cu), silver (Ag), copper ... -
An Experimental Study of Passive and Active Heat Transfer Enhancement in Microchannels
(The American Society of Mechanical Engineers (ASME), 2014)An experimental study on singlephase heat transfer and fluid flow downstream a single microscale pillar in a microchannel was conducted. A secondary jet flow was issued from slits formed along the pillar. A comparison of ... -
Ultra Fast Cooling and Its Effect on the Mechanical Properties of Steel
(The American Society of Mechanical Engineers (ASME), 2014)The objective of this work is to study about the ultrafast cooling of a hot static 6 mm thick steel plate (AISI1020) by air assisted spray cooling. The study covers the effect of air flow rate and the water impingement ... -
An Experimental Investigation of Pressure Drop in Expanding Microchannel Arrays
(The American Society of Mechanical Engineers (ASME), 2014)The pressure effects of expanding the cross section of microchannels along the direction of flow are investigated across four rates of channel expansion in the flow boiling of R134a. Prior investigation by the authors ... -
Physics of the Interaction of Ultrasonic Excitation With Nucleate Boiling
(The American Society of Mechanical Engineers (ASME), 2014)Physics of ultrasoundassisted augmentation of saturated nucleate boiling through the interaction of multiphase fluid flow is revealed in the present work. Different regimes of influence of ultrasound, ranging from augmentation ... -
Effect of Uncertainty in Blowing Ratio on Film Cooling Effectiveness
(The American Society of Mechanical Engineers (ASME), 2014)In this study, the effect of randomness of blowing ratio on film cooling performance is investigated by combining direct numerical simulations with a stochastic collocation approach. The geometry includes a 35deg inclined ... -
Measurement of Interface Thermal Resistance With Neutron Diffraction
(The American Society of Mechanical Engineers (ASME), 2014)A noncontact, nondestructive neutron diffraction technique for measuring thermal resistance of buried material interfaces in bulk samples, inaccessible to thermocouple measurements, is described. The technique uses spatially ...