The vortex instability characteristics of laminar magneto-hydrodynamic (MHD) natural convection flow over a horizontal plate with a prescribed surface temperature and mass flux are studied. In the base flow, similarity solutions are obtained for a specific magnetic field strength and surface mass flux. The stability analysis is based on the linear stability theory incorporated with the non-parallel flow model. The skin-friction factor, Nusselt number and instability parameters are obtained by conducting a parametric study of all relevant parameters, such as magnetic parameter M and blowing/suction parameter f w. It is found that the magnetic effect decreases the heat transfer rate and destabilizes the flow. Furthermore, the influence of magnetic effect on vortex instability is more pronounced for a blowing surface and fluid with Pr = 0.7. The present results can be utilized as the basis for potential engineering applications such as chemical vapor deposition and cooling of electronic packages.
|Number of pages
|Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
|Published - 2008
All Science Journal Classification (ASJC) codes
- General Engineering