Hall effect on thermal instability in a horizontal layer of nanofluid saturated in a porous medium
by Ramesh Chand; Gian C. Rana
International Journal of Theoretical and Applied Multiscale Mechanics (IJTAMM), Vol. 3, No. 1, 2014

Abstract: Hall effect on thermal instability of nanofluid in a porous medium is investigated by using Galerkin residuals method for free-free boundaries. For porous medium Darcy model is used. The model used for the nanofluid describes the effects of Brownian motion and thermophoresis. A linear stability theory based upon the perturbation method and normal mode technique is used to find the expression for Rayleigh number for a horizontal layer of nanofluid. The influence of Hall effect and other parameters on the stability is investigated both analytically and graphically. It is found that Hall effect and porosity destabilises the fluid layer while the magnetic field and Lewis number stabilises the fluid layer heated from below.

Online publication date: Sat, 16-May-2015

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