Showing papers in "International Communications in Heat and Mass Transfer in 2000"

TL;DR: In this article, experiments were carried out in channels with hydraulic diameter ranging from 30 μm to 344 μm at Reynolds number ranging from 20 to 4000 based on the experimental data collected and those available in the literature, comparisons and analysis have been carried out to evaluate the possible phenomena occurring in the liquid flow in microchannels.

TL;DR: In this article, the authors present new experimental measurements for pressure drop and heat transfer coefficient in microchannel heat sinks using standard Silicon 100 wafers and two different channel patterns were studied, one series pattern carried fluid through a longer winding channel between the inlet and the outlet headers.

TL;DR: In this paper, a double-decomposition (time and volume) methodology is suggested and the differences between those two mathematical treatments are highlighted, and the turbulence kinetic energy equation resulting from application of the two averaging operators, following both orders of integration are different.

TL;DR: In this article, a simple coordinate transformation is employed to transform the complex wavy surface to a flat plate, and the obtained boundary layer equations is then solved by the local nonsimilarity method and the cubic spline collocation method.

TL;DR: In this article, the transverse thermal conductivity of high density polyethylene reinforced with chopped strand glass fiber mat is investigated experimentally for temperatures ranging from 10°C to 85°C.

TL;DR: In this paper, the results of an experimental study of two-phase flow and boiling heat transfer in channels packed with sintered copper bi-dispersed porous media are presented.

TL;DR: In this article, the authors demonstrate that both approaches lead to equivalent equations when one takes into account both time fluctuations and spatial deviations of velocity and temperature in incompressible flows through homogeneous rigid porous media.

TL;DR: In this article, a comparative investigation between experiments and numerical simulation is presented for turbulent air impingement flow on a square pin-fin heat sink, where the numerical results illustrate the complex pressure gradients within the fin array.

TL;DR: The effect of surface roughness of a uniformly heated plate on the average heat transfer characteristics of an impinging air jet was experimentally investigated in this article, where two aluminum plates, one with a flat surface and the second with some roughness added to the surface were fabricated.

TL;DR: In this article, the average convective heat transfer coefficients have been measured by using radiation pyrometer, which offers a new method, and a correlation in terms of the average Nusselt number and rotating Reynolds number has been established.

TL;DR: In this paper, the thermal conductivities of two samples of bi-dispersed porous media (with micro-pore diameter of 80 μm and macro pore diameters of 200μm and 400 μm) saturated with three different fluids (air, FC-72 and water) respectively were conducted.

TL;DR: In this article, the effects of dimension ratio and Rayleigh number on the flow structure and heat transfer were investigated in an annulus between two isothermal concentric square ducts.

TL;DR: In this paper, the heat transfer of slot jets of air impinging on the surface of a circular cylinder by forced convection has been investigated, and the experiments have been performed for a Reynolds number of the impinging air ranging from Re=4000 to Re=20000.

TL;DR: In this paper, the effect of variable viscosity and magnetic field on the flow and heat transfer past a continuously moving porous plate in a stationary fluid taking into account the radiation effect has been analyzed.

TL;DR: In this article, the effects of lateral mass flux with prescribed temperature and velocity on vertical free convection boundary layers in a fluid-saturated porous medium with internal heat generation were studied.

TL;DR: In this paper, a numerical analysis of free convection coupled heat and mass transfer is presented for non-Newtonian power law fluids with yield stress flowing over a vertical flat plate embedded in a fluid-saturated porous medium.

TL;DR: In this paper, the effects of viscous dissipation, Joule heating and heat source/sink on non-Darcy MHD natural convection flow over an isoflux permeable sphere in a porous medium are numerically analyzed.

TL;DR: In this paper, a study on the combined heat and mass transfer by natural convection from truncated cones embedded in fluid saturated porous media with variable wall temperature and concentration is reported.

TL;DR: In this paper, a separated flow model of refrigerants through capillary tubes is derived and the effects of various correlations of relevant parameters, such as frictional pressure gradient and slip ratio, on the prediction of a separation flow model are investigated.

TL;DR: The model of Krishna et al. (Chem. Eng. Sci., 54, 171 (1999) was found applicable for the range of column diameters studied, after accounting for the influence of alcohol addition on the regime transition parameters as discussed by the authors.

TL;DR: In this paper, an improved lumped parameter approach was proposed to analyze the heat conduction in a nuclear fuel rod, where the circunferential symmetry was assumed with the heat transfer through the gap modelled by a heat transfer coefficient.

TL;DR: In this paper, a detailed analysis of the resistance to heat transfer across the joint to the resistance of heat flow from the specimens to the surroundings is presented, and it is shown that the heat losses may be reduced by the provision of a shield.

TL;DR: In this article, an experimental setup for the inverse determination of steady-state heat transfer coefficient in a two-dimensional system is proposed, which requires temperatures measurements at accessible and non-intrusive locations, but does not require heat flux measurement.

TL;DR: In this article, the authors examined the impingement of laminar fluid jets in a confined cylindrical chamber using flow visualization, laser Doppler anemometry (LDA) measurements and steady and unsteady three dimensional finite volume numerical simulations using boundary fitted non-orthogonal coordinates.

TL;DR: In this article, the influence of the Soret effect on natural convection in a vertical cavity filled with a binary liquid was investigated, where the two vertical walls of the cavity are subject to constant fluxes of heat while the two horizontal ones are adiabatic.

TL;DR: In this paper, the electric field distribution obtained from solving Maxwell's equations was coupled to the energy equation to predict the temperature distribution during microwave heating of solids, and the effect of sample rotation was incorporated to the model.

TL;DR: In this article, the boundary-layer flow induced by a constant temperature vertical surface embedded in a porous medium is modified by time-periodic variations in the gravitational acceleration, and the amplitude of these variations is assumed to be small compared with the mean acceleration.

TL;DR: In this article, a numerical study on double-diffusive natural convection within a vertical circular porous annulus is carried out, where the Brinkman extended Darcy model is used to satisfy the no-slip boundary condition on a solid wall, and the density variation is taken into account by the Boussinesq approximation.

TL;DR: In this article, the U-tube steam generator used in most pressurized water reactors is simulated for thermal-hydraulic transient analysis of nuclear power plants, and the results of the transient analysis show the expected trends in all cases.

TL;DR: In this paper, the influence of thermal radiation on buoyancy induced flow over horizontal flat plate embedded in a non-Newtonian fluid saturated porous medium is investigated, and the results for the details of the velocity and temperature profiles are shown on graphs.