Natural Convection of Non-Newtonian Fluids About a Horizontal Surface in a Porous Medium

[+] Author and Article Information
H. T. Chen, C. K. Chen

Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan, R.O.C.

J. Energy Resour. Technol 109(3), 119-123 (Sep 01, 1987) (5 pages) doi:10.1115/1.3231336 History: Received December 01, 1986; Revised June 13, 1987; Online October 22, 2009


The problem of natural convection of a non-Newtonian power-law fluid about a horizontal impermeable surface in the porous medium is considered, where the plate is assumed with a nonuniform heat flux distribution. The present study is based on the boundary layer approximation and only suitable for a high Rayleigh number. Similarity solutions are obtained by using the fourth-order Runge-Kutta method and the Nachtsheim-Swigert iteration scheme. The effects of the nonuniform wall heat flux q w (x) and the new power-law index n on the heat transfer characteristics are discussed.

Copyright © 1987 by ASME
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