Influence of Variable Fluid Density on Free Convection in Rectangular Porous Media

[+] Author and Article Information
D. R. Marpu, V. V. Satyamurty

Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India

J. Energy Resour. Technol 111(4), 214-220 (Dec 01, 1989) (7 pages) doi:10.1115/1.3231427 History: Received August 30, 1988; Revised July 25, 1989; Online October 22, 2009


Free convection in rectangular porous media has been numerically investigated incorporating the dependence of fluid density on temperature in all the conservation equations. The fluid density dependence on temperature is described through a parametric equation which can be used for different fluids. The method of successive accelerated replacement scheme has been employed to obtain numerical results for a wide range of Rayleigh numbers, 50 to 1000, aspect ratio, 0.1 to 10 and density difference ratio of 0 to 0.75. The increase in the average Nusselt number at a Rayleigh number of 100 and an aspect ratio of unity is 9.57 percent when density difference ratio is 0.25, whereas it is as high as 19.88 percent when the density difference ratio is 0.5.

Copyright © 1989 by ASME
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