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|標題:||Maximum density effects on natural convection of micropolar fluids between horizontal eccentric cylinders||作者:||Char, M.I.
|關鍵字:||mechanics||Project:||International Journal of Engineering Science||期刊/報告no：:||International Journal of Engineering Science, Volume 36, Issue 2, Page(s) 157-169.||摘要:||
Natural convection heat transfer of micropolar fluids near the maximum density in a horizontal eccentric annulus is studied numerically. The governing equations, in terms of vorticity, stream function and temperature, are expressed in a body-fitted coordinate system, and solved numerically by the finite difference method with the modified strongly implicit procedure. The main objective is to investigate the differences of fluid dow and temperature fields for various eccentricities e with Rayleigh numbers Ra ranging from 671 to 5 x 10(4) and inversion parameter Theta(m) variations between 0 and 1. The micropolar parameter Delta is varied from 0 to 1. The results indicate that both inversion parameter and eccentricities have a strong effect on the flow structure and heat transfer rate in the annulus. In comparison to a Newtonian fluid, the mean Nusselt number is reduced for a micropolar fluid. Moreover, good agreement is obtained with the present numerical results and the available experimental data. (C) 1998 Elsevier Science Ltd.
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