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Showing papers in "International Communications in Heat and Mass Transfer in 1996"


Journal ArticleDOI
TL;DR: In this paper, various conduction models for two-phase materials are considered and the range of applicability of these models is discussed, and experimental work is carried out on construction sand of various grain size and different porosity in air at atmospheric pressure, and the results are compared with theoretical models.

182 citations


Journal ArticleDOI
TL;DR: In this paper, the authors investigated the direct contact condensation phenomenon, which occurs when steam is injected into the subcooled water, and found that the magnitude of the average condensation heat transfer coefficient depends mainly on the steam mass flux.

182 citations


Journal ArticleDOI
TL;DR: In this article, the heat transfer in a stagnation-point fluid flow over a flat sheet stretching with a linear velocity was considered and the thermal conductivity was assumed to vary linearly with temperature.

171 citations


Journal ArticleDOI
TL;DR: In this article, two enhancement techniques are proposed to improve thermal conductivity of phase-change materials (PCMs) with high energy storage density, such as LiH encapsulated in a thin SS304 container.

146 citations


Journal ArticleDOI
Ali J. Chamkha1
TL;DR: In this article, a non-Darcy hydromagnetic free convection flow of an electrically conducting and heat-generating fluid over a vertical cone and a wedge adjacent to a porous medium is developed.

113 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of nozzle geometry and confinement on the potential core and subsequent axial development of a turbulent axisymmetric air jet at a Reynolds number of 22 500 have been studied.

107 citations


Journal ArticleDOI
TL;DR: In this paper, a technique was developed for evaluation of the eigenvalues for the Graetz problem extended to slip-flow and the first four eigen values for Knudsen numbers of 0.02, 0.04, …, and 0.12 were found.

73 citations


Journal ArticleDOI
TL;DR: In this article, the effect of magnetic field on the flow and heat transfer past a continuously moving porous plate in a stationary fluid has been analyzed and the governing boundary layer equations have been reduced to a set of nonlinear ordinary differential equations using similarity transformations.

64 citations


Journal ArticleDOI
TL;DR: In this article, an experimental investigation was conducted on the combustion characteristics of droplets of n-heptane, n-decane and n-dodecane emulsified with various amount of water and freely falling in a furnace of controlled temperature.

53 citations


Journal ArticleDOI
TL;DR: In this article, a numerical study has been conducted for natural convection heat transfer for air from two vertically separated horizontal heated cylinders confined to a rectangular enclosure having vertical walls of finite conductances and horizontal walls at the heat sink temperature.

51 citations


Journal ArticleDOI
TL;DR: In this article, the authors used the non-linear estimation procedure for the determination of the interfacial heat transfer coefficient (h) in steady state unidirectional heat flow in casting solidification.

Journal ArticleDOI
TL;DR: In this article, an analysis for the time averaged entropy generation due to both flow and heat transfer losses in the heat exchangers of a thermoacoustic engine has been developed, and an expression for the optimum dimensionless heat exchanger area corresponding to minimum entropy generation has been determined in terms of three other dimensionless parameters.

Journal ArticleDOI
TL;DR: In this paper, an experimental study on pool boiling heat transfer from finned copper surfaces immersed in a saturated dielectric liquid (Galden HT-55) is presented.

Journal ArticleDOI
TL;DR: In this article, a closed form exact solution for the forced flow past a sphere which is embedded in a porous medium using the Brinkman model is presented, and it is shown that there is no flow separation for this flow configuration.

Journal ArticleDOI
TL;DR: In this article, an expression for the effectiveness of a spiral coil heat exchanger (SCHE) was obtained for the effect of various design parameters on the performance of the SCHE.

Journal ArticleDOI
TL;DR: In this paper, a comparison of flow characteristics for CFC-12 and HFC-134a in a capillary tube was presented, and the results revealed that even with minor differences in refrigerant properties, the differences in flow characteristics may be significant and that 15% difference or more in critical tube length may be expected.

Journal ArticleDOI
Moon Hyun Chun1, myeong-gie kang1
TL;DR: In this article, the combined effects of the heat exchanger tube geometries of advanced light water reactors (ALWRs) passive residual heat removal system (PRHRS) on the nucleate pool boiling heat transfer in a scaled in-containment refueling water storage tank (IRWST) have been determined using various combinations of tube diameters, surface roughness, and tube orientation.

Journal ArticleDOI
TL;DR: In this paper, a general formulation of an alternating direction implicit (ADI) method was derived by extending Peaceman and Rachford scheme from two-dimensions to a N -dimensional space (N ≥ 2).

Journal ArticleDOI
TL;DR: An analytical solution of a two-dimensional thermoelasticity problem is determined for a thin coating attached to a substrate in this paper, where the coating is treated as a stratified multilayer structure composed of layers with varying thermophysical and optical characteristics.

Journal ArticleDOI
TL;DR: In this article, the transient response of a concentric tube annulus filled with a porous medium to a nonthermal equilibrium forced convective flow of incompressible fluid through it is analyzed.

Journal ArticleDOI
TL;DR: In this article, the temperature distribution along the primary cutting edges and on the flank surfaces were calculated numerically using the variational approach of the three-dimensional finite element method for two different cross-sectional shape designs of a drill body.

Journal ArticleDOI
TL;DR: In this article, the effects of spacer grids and mixing vanes on critical heat flux (CHF) have been experimentally investigated for low-pressure water at low, using two different types of test sections: an annulus (19-mm I.D., 33.5mm O.D. and 0.7m long) and a round tube (10.8-mmI.D, 0.3m long).

Journal ArticleDOI
TL;DR: In this paper, the boundary layer equations for steady incompressible laminar forced convection in the entrance region of a parallel plates channel are solved through the integral transform method, by adopting the stream function-only formulation, which was preferred over the more commonly used primitive variables formulation.

Journal ArticleDOI
TL;DR: In this article, the authors studied the condensation heat transfer characteristics of horizontal enhanced tubes, including 26, 40 fpi low fin tubes and four three-dimensional fin tubes, at three working pressures, namely 1.32, 1.47 and 1.62 MPA.

Journal ArticleDOI
TL;DR: In this paper, a non-isothermal power-law fluid model was derived to evaluate the effect of various processing parameters as well as melt rheological behavior on the skin melt formation during gas-assisted injection molding.

Journal ArticleDOI
TL;DR: In this article, the NaCl-H2O binary compound and a recently introduced continuum model were used to simulate the behavior of sea ice in the form of a slush where both liquid and solid phases coexist.

Journal ArticleDOI
TL;DR: In this article, the authors proposed an improved model for the single-blow technique which is commonly used to measure the thermal performance of a cryocooler's regenerator matrix, which includes the heat flux from the fluid into the side wall and the axial conduction of the wire-screen matrix and side wall as a suddenly heated fluid passes through the wire screen matrix.

Journal ArticleDOI
TL;DR: In this article, two Mathematica rules, converting double and triple summation series to a single one, are developed for elimination of redundant equations in the truncated ordinary differential equations system that appears in connection with application of the generalized integral transform technique (GITT) in the hybrid solution of linear and non-linear heat and fluid flow problems.

Journal ArticleDOI
TL;DR: In this paper, the interaction between turbulent acetylene flames was investigated experimentally by the analysis of their visible lengths, and the results quantify the increase of flame length of multiple jets of equal injection tube radii and equal initial velocities as the flame separation distance decreases and as the number of jets increases.

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the effect of the shear rate-dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement in a pipe flow.