Aiding and opposing mixed convection from a cylinder in a saturated porous medium

被引:0
作者
Zhou, MJ [1 ]
Lai, FC [1 ]
机构
[1] Univ Oklahoma, Sch Aerosp & Mech Engn, Norman, OK 73019 USA
关键词
D O I
10.1615/jpormedia.v5.i2.30
中图分类号
O414.1 [热力学];
学科分类号
摘要
Numerical solutions are presented for mixed convection from a cylinder embedded in a saturated porous medium. Both aiding and opposing flow conditions are considered. Numerical calculations using the finite difference method with body-fitted coordinates have covered a wide range of governing parameters (i.e., 10 less than or equal to Re less than or equal to100, 0 less than or equal to Gr less than or equal to 400 and Pr = 0.7). The present results agree well with the previous study by Badr and Pop (1988)for flows at a small Reynolds number and a small mixed convection parameter Gr/Re. However, significant discrepancies have been found between the two studies for flows at a high Reynolds number and a high mixed convection parameter Gr/Re. In addition, oscillatory flows are observed for opposing flows at high Gr/Re, which were not revealed in the previous study (Badr and Pop, 1988). Several reasons are offered to explain the discrepancies found.
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页码:103 / 111
页数:9
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