化学反应时混合对流传热传质磁流体流经多孔楔形体粘度变化及热分层影响的数值研究

I·姆哈敏; R·坎达沙密; A·B·哈米什

doi:10.3879/j.issn.1000-0887.2009.11.002

化学反应时混合对流传热传质磁流体流经多孔楔形体粘度变化及热分层影响的数值研究

doi: 10.3879/j.issn.1000-0887.2009.11.002

马来西亚敦胡先翁大学科学研究中心,马来西亚

详细信息

中图分类号: O357.1
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出版历程
- 收稿日期: 2008-09-06
- 修回日期: 2009-07-09
- 刊出日期: 2009-11-15

Numerical Investigation of Variable Viscosity and Thermal Stratification Effects on MHD Mixed Convective Heat and Mass Transfer Past a Porous Wedge in the Presence of Chemical Reaction

University Tun Hussein Onn Malaysia, Centre for Science Studies, Malaysia

摘要

摘要: 在磁流体力学中，当粘滞不可压缩传热传质混合对流的导电流体，流经多孔楔形体且伴有化学反应时，对其粘度变化及热分层影响进行了分析．将楔形体壁面埋入均匀的非Darcy多孔介质中，壁面具有吸入或抽出流体的功能．通过相似变换，将边界层的控制方程写为无量纲形式．使用有限差分法，对变换后耦合的非线性常微分方程进行数值解．对无量纲参数的不同值进行数值计算时，略去三阶以上的高阶差分．图形形式给出的结果表明，这些参数对流场及其它物理量都有重要影响．与已知文献的结果比较表明，它们高度地一致．
- 可变粘度 /
- 化学反应 /
- 非Darcy流动 /
- 混合对流 /
- 热分层 /
- 磁影响
Abstract: An analys is was presented to investigate the effects of variable viscosity and thermal stratification on MHD mixed convective heat and mass transfer of a viscous, incom pressible and electrically conducting fluid past a porous wedge in the presence of chemical reaction. The wall of the wedgewas embedded in a uniform non-Darcian porousmedium in order to allow for possible fluid wall suction or in jection. The governing boundary layer equations were written into a dmiension less form by smiilarity transformations. The transformed coupled nonlinear ordinary differential equations were solved numerically by using finite difference methods. Numericalcal-culations up to third order level of truncation were carried out for different values of dmiensionless parameters. The results are presented graphically and the conclusion is drawn that the flow field and other quantities of physical interest are significantly in fluenced by these parameters. The results are compared with those known from the literature and excellent agreement between the results is obtained.
- variable viscosity /
- chemical reaction /
- non-Darcy flow /
- mixed convection /
- thermal stratification /
- magnetic effect

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