Journal ArticleDOI
Analysis of thermal dispersion effect on vertical-plate natural convection in porous media
J.T. Hong,C.L. Tien +1 more
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In this paper, the effect of transverse thermal dispersion on natural convection from a vertical, heated plate in a porous medium is examined analytically, and the results show that due to the better mixing of the thermal dispersal effect, the heat transfer rate is greatly increased.About:
This article is published in International Journal of Heat and Mass Transfer.The article was published on 1987-01-01. It has received 75 citations till now. The article focuses on the topics: Natural convection & Heat transfer.read more
Citations
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Journal ArticleDOI
Analysis of Variants Within the Porous Media Transport Models
Bader Alazmi,Kambiz Vafai +1 more
TL;DR: In this paper, the effects of the Darcy number, inertia parameter, Reynolds number, porosity, particle diameter, and the fluid-to-solid conductivity ratio on the variances within each of the four areas are analyzed.
Book ChapterDOI
Convective and Radiative Heat Transfer in Porous Media
Chang-Lin Tien,Kambiz Vafai +1 more
TL;DR: In this article, the authors describe convective and radiative heat transfer in porous media, both with or without phase change, and show that for the flow field the boundary effect is confined within a thin momentum boundary layer.
Journal ArticleDOI
Natural convection in metal foams with open cells
TL;DR: In this paper, a combined experimental and numerical study on natural convection in open-celled metal foams is presented, and the experimental results show that the non-equilibrium effect between solid foam skeleton and air is significant, accounting for up to 50% of the effective foam conductivity obtained at ambient pressure.
Journal ArticleDOI
Metal Foam and Finned Metal Foam Heat Sinks for Electronics Cooling in Buoyancy-Induced Convection
TL;DR: In this article, the authors present experimental results on buoyancy-induced convection in aluminum metal foams of different pore densities and porosities and show that compared to a heated surface, the heat transfer coefficients in these heat sinks are five to six times higher.
Journal ArticleDOI
Dispersion in cellular thermal convection in porous layers
John G. Georgiadis,Ivan Catton +1 more
TL;DR: In this paper, a numerical and experimental study for the case of two-dimensional buoyancy-driven convection in saturated horizontal packed beds is reported for weak dispersion and the effect of dispersion on Nusselt number is stronger than that of inertia unless the Prandtl number of the porous medium is of order 0.01 or less.
References
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Journal ArticleDOI
Heat and mass transfer in packed beds
Donald A. Plautz,H. F. Johnstone +1 more
TL;DR: In this article, mass diffusivities, effective thermal conductivities, and wall heat transfer coefficients were measured in an 8-in. tube packed with 1/2-and 3/4in. glass spheres.
Journal ArticleDOI
Free convection about a vertical flat plate embedded in a porous medium with application to heat transfer from a dike
Ping Cheng,W. J. Minkowycz +1 more
TL;DR: In this article, an analysis is made for steady free convection about a vertical flat plate embedded in a saturated porous medium at high Rayleigh numbers, where boundary layer thickness, local and overall surface heat flux, and local and average heat transfer coefficients are derived for an isothermal dike intruded in an aquifer.
Journal ArticleDOI
Void fraction distribution in beds of spheres
R. F. Benenati,C. B. Brosilow +1 more
TL;DR: The radial variation of void fraction within a packed bed of uniform spheres has been found to vary from unity at the wall to about 38% in the interior of large beds.
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Effects of non-Darcian and nonuniform porosity on vertical-plate natural convection in porous media
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