Convective flow and heat transfer through a composite porous/fluid system have been studied numerically. The composite medium consists of a fluid layer overlaying a porous substrate, which is attached to the surface of the plate. The numerical simulations focus primarily on flows that have the boundary layer characteristics. However, the boundary layer approximation was not used. A general flow model that accounts for the effects of the impermeable boundary and inertia is used to describe the flow inside the porous region. Several important characteristics of the flow and temperature fields in the composite layer are reported. The dependence of these characteristics on the governing parameters such as the Darcy number, the inertia parameter, the Prandtl number, and the ratio of the conductivity of the porous material to that of the fluid is also documented. The results of this investigation point out a number of interesting practical applications such as in frictional drag reduction, and heat transfer retardation or enhancement of an external boundary.
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Analysis of Surface Enhancement by a Porous Substrate
Kambiz Vafai,
Kambiz Vafai
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
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Sung-Jin Kim
Sung-Jin Kim
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
Search for other works by this author on:
Kambiz Vafai
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
Sung-Jin Kim
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
J. Heat Transfer. Aug 1990, 112(3): 700-706 (7 pages)
Published Online: August 1, 1990
Article history
Received:
September 25, 1989
Revised:
February 27, 1990
Online:
May 23, 2008
Citation
Vafai, K., and Kim, S. (August 1, 1990). "Analysis of Surface Enhancement by a Porous Substrate." ASME. J. Heat Transfer. August 1990; 112(3): 700–706. https://doi.org/10.1115/1.2910443
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