Journal of Heat Transfer: Recent submissions
Now showing items 2441-2460 of 3611
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Numerical Simulation of Laminar Liquid Film Condensation in a Horizontal Circular Minichannel
(The American Society of Mechanical Engineers (ASME), 2012)A three-dimensional volume of fluid (VOF) simulation of condensation of R134a inside a 1 mm i.d. minichannel is presented. The minichannel is horizontally oriented and the effect of gravity is ... -
Heat Conduction of a Porous Material
(The American Society of Mechanical Engineers (ASME), 2012)In this study, we introduce our numerical and experimental works for the thermal conductivity reduction by using a porous material. Recently thermal conductivity reduction has been one of the ... -
Numerical Modeling of the Conjugate Heat Transfer Problem for Annular Laminar Film Condensation in Microchannels
(The American Society of Mechanical Engineers (ASME), 2012)This paper presents numerical simulations of annular laminar film condensation heat transfer in microchannels of different internal shapes. The model, which is based on a finite volume formulation ... -
Transient Characteristics of Pool Boiling Heat Transfer in Nanofluids
(The American Society of Mechanical Engineers (ASME), 2012)This study shows the transient characteristics of the pool boiling curves using nanofluid as the boiling fluid. This time-dependency is in sharp contrast to a unique steady-state pool boiling ... -
Theoretical Two-Dimensional Modeling of Gas Conduction Between Finite Parallel Plates in High Vacuum
(The American Society of Mechanical Engineers (ASME), 2012)A theoretical approach based on gaskinetic theory is described and applied for the modeling of steady-state free-molecule gaseous heat conduction within a diffusive enclosure. With a representative ... -
Microfluidic Bubble Generation by Acoustic Field for Mixing Enhancement
(The American Society of Mechanical Engineers (ASME), 2012)We demonstrate the bubble generation in a microfluidic channel by both experimental observation and numerical simulations. The microfluidic channel contains a nozzle-shaped actuation chamber with ... -
Precursor Film Formation Process Ahead Macroscopic Contact Line of Spreading Droplet on Smooth Substrate
(The American Society of Mechanical Engineers (ASME), 2012)The authors pay their special attention to formation process of wafer-thin liquid film, known as “precursor film,” ahead moving macroscopic contact line of a droplet spreading on a solid ... -
Silicon Nanowire Conductance in the Ballistic Regime: Models and Simulations
(The American Society of Mechanical Engineers (ASME), 2012)This study deals with phonon heat transport in silicon nanowires. A review of various methods that can be used to assess thermal conductance of such nanodevices is presented. Here, a specific ... -
DSMC Scheme for Phonon Transport in Solid Thin Films
(The American Society of Mechanical Engineers (ASME), 2012)Analysis of phonon dynamics based on a linearized Boltzmann transport equation is widely used for thermal analysis of solid thin films, but couplings among various phonon modes appear in some ... -
Characterization of Surface Roughness Effects on Laminar Flow in Microchannels by Using Fractal Cantor Structures
(The American Society of Mechanical Engineers (ASME), 2012)The fractal characterization of surface topography by using Cantor set structures is introduced to quantify the microchannel surface. Based on this fractal characterization of surface, a model ... -
Non-Fourier Heat Conduction in Carbon Nanotubes
(The American Society of Mechanical Engineers (ASME), 2012)Fourier’s law is a phenomenological law to describe the heat transfer process. Although it has been widely used in a variety of engineering application areas, it is still questionable to reveal ... -
A Novel Thermal Driving Force for Nanodevices
(The American Society of Mechanical Engineers (ASME), 2012)Design and construction of nanomotors are one of the most attractive fields in nanotechnology. Following the introduction of a novel concept of the thermomass, the relative mass of a phonon ... -
An Accurate and Stable Numerical Method for Solving a Micro Heat Transfer Model in a One-Dimensional N-Carrier System in Spherical Coordinates
(The American Society of Mechanical Engineers (ASME), 2012)We consider the generalized micro heat transfer model in a 1D microsphere with N-carriers and Neumann boundary condition in spherical coordinates, which can be applied to describe nonequilibrium ... -
Fabrication and Experimental Characterization of Nanochannels
(The American Society of Mechanical Engineers (ASME), 2012)Nanofluidics is the science and technology involving a fluid flowing in or around structures with a least one dimension in the nanoscale, which is defined as the range from 1 nm to 100 nm. ... -
Lagging Behavior in Biological Systems
(The American Society of Mechanical Engineers (ASME), 2012)The lagging behavior is first exemplified by a rapidly stretched spring and a one-dimensional fin to illustrate the phase-lag concept via the thermal and mechanical properties that most engineers ... -
Thermal Nanofluid Property Model With Application to Nanofluid Flow in a Parallel Disk System—Part II: Nanofluid Flow Between Parallel Disks
(The American Society of Mechanical Engineers (ASME), 2012)This is the second part of a two-part paper which proposes a new theory explaining the experimentally observed enhancement of the thermal conductivity, knf , of nanofluids (Part I) and discusses ... -
Thermal Nanofluid Property Model With Application to Nanofluid Flow in a Parallel-Disk System—Part I: A New Thermal Conductivity Model for Nanofluid Flow
(The American Society of Mechanical Engineers (ASME), 2012)This is a two-part paper, which proposes a new theory explaining the experimentally observed enhancement of the thermal conductivity, knf , of nanofluids (Part I) and discusses simulation results ... -
Heat Transfer Analysis of Falling Film Evaporation on a Horizontal Elliptical Tube
(The American Society of Mechanical Engineers (ASME), 2012)Heat and mass transfer analysis of falling liquid film over a heated horizontal elliptical tube used in desalination systems are investigated. The heat transfer analysis is based on the energy ... -
Effects of Homogeneous–Heterogeneous Reactions on the Viscoelastic Fluid Toward a Stretching Sheet
(The American Society of Mechanical Engineers (ASME), 2012)The effects of homogeneous–heterogeneous reactions on the steady viscoelastic fluid toward a stretching sheet are numerically investigated in this paper. The model developed by Chaudhary and Merkin ... -
Effect of Diamond Nanolubricant on R134a Pool Boiling Heat Transfer
(The American Society of Mechanical Engineers (ASME), 2012)This paper quantifies the influence of diamond nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, and flat surface. Nanofluids are liquids that ...