Hsiuping University of Science and Technology Institutional Repository : Item 310993100/325
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题名: Vortex instability of MHD natural convection flow over an isothermal horizontal plate in a saturated porous medium
作者: Chung-Ting Hsu
关键词: MHD
porous medium
natural convection
horizontal
日期: 2007-03
上传时间: 2008-08-25T06:32:27Z
摘要: A numerical analysis is performed to study the vortex instability of a horizontal magnetohydrodynamics (MHD) natural convection boundary layer flow in a saturated porous medium with surface mass flux. The stability analysis is based on the linear stability theory. The resulting eigenvalue problem is solved by the local similarity method. The velocity and temperature profiles, local Nusselt number, as well as instability parameters for magnetic parameter M ranging from 0 to 4 are presented. It is found that as magnetic parameter M increases, the heat transfer rate and tangential velocity decrease. Furthermore, it is shown that as the magnetic parameter M increases, the neutral stability curves shift to lower Rayleigh number and lower wave number, indicating a destabilization of the flow to vortex instability. It is also shown that suction stabilizes the flow, while blowing destabilizes the flow.
關聯: 修平學報 14, 85-98
显示于类别:[機械工程系(含精密機械與製造科技碩士班)] 期刊論文

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