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Z. Naturforsch. 67a, 275 – 281 (2012)
doi:10.5560/ZNA.2012-0020
Thermosolutal Convection in a Couple-Stress Fluid in Uniform Vertical Magnetic Field
Mahinder Singh1 and Pardeep Kumar2
1 Department of Mathematics, Govt Post Graduate College Seema (Rohru), Himachal Pradesh, India
2 Department of Mathematics, ICDEOL, H.P. University, Shimla (H.P), India
Received November 24, 2011 / published online May 2, 2012
Reprint requests to: M. S.; E-mail: mahinder_singh91@rediffmail.in
The effect of a uniform vertical magnetic field on thermosolutal convection in a layer of an electrically conducting couple-stress fluid heated and soluted from below is considered. For the case of stationary convection, the stable solute gradient, magnetic field, and couple-stress parameter have stabilizing effect on the system. It is also observed that a stable solute gradient and a magnetic field introduce oscillatory modes in the system, but in the absence of a stable solute gradient and a magnetic field, oscillatory modes are not allowed and the principle of exchange of stabilities is valid.
Key words: Thermosolutal Convection; Couple-Stress Fluid; Uniform Vertical Magnetic Field.
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