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THERMAL INSTABILITY IN A COUPLE STRESS NANOFLUID IN PRESENCE OF HORIZONTAL MAGNETIC FIELD

Suman Sindhwani, Dr. Manjeet Singh, Rachana Gupta

Page No. : 25-39

ABSTRACT

In this paper thermal instability of a horizontal layer of Couple Stress nanofluid in a porous medium is investigated under effect of horizontal magnetic field. It is assumed that nanoparticle flux is zero on the boundaries. Stationary convection is studied using normal mode technique. It is found that critical Rayleigh Number increases with an increase in the magnetic Chandrasekhar number as well as couple stress parameter. Stability of system has been investigated with effects of Lewis number, concentration Rayleigh number, modified diffusivity ratio and magnetic field. .The effects of various parameters on thermal Rayleigh Number have been presented graphically.

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