Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/36389
標題: Maximum density effects on natural convection in a vertical annulus filled with a non-Darcy porous medium
作者: Char, M.I.
賈明益
Lee, G.C.
關鍵字: water
Project: Acta Mechanica
期刊/報告no:: Acta Mechanica, Volume 128, Issue 3-4, Page(s) 217-231.
摘要: 
This article numerically studies the problem of natural convection in a porous medium saturated with cold water, under density inversion, within a vertical annulus. In modeling the flow in the porous medium the non-Darcy effects, which include the Forchheimer inertia and Brinkman viscous effects are taken into account. The governing equations are solved numerically by the finite difference method using the modified strongly implicit procedure. The effects of the inversion parameter Theta(m), radius ratio R*, aspect ratio AR, Forchheimer inertia parameter Fc/Pr, and Darcy number parameter Da on the heat transfer and fluid flow characteristics are discussed in detail. Results show that both the inversion parameter and radius ratio have a significant influence on the flow structure and heat transfer rate in the annulus. It is also found that the mean Nusselt number decreases as the Forchheimer inertia parameter or the Darcy number increases. Moreover, the results obtained here are also compared and favorably agree with numerical results and with experimental data.
URI: http://hdl.handle.net/11455/36389
ISSN: 0001-5970
DOI: 10.1007/bf01251892
Appears in Collections:應用數學系所

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