TITLE:
Study of Rayleigh-Bénard Magneto Convection in a Micropolar Fluid with Maxwell-Cattaneo Law
AUTHORS:
Subbarama Pranesh, Rojipura V. Kiran
KEYWORDS:
Rayleigh-Bénard Magneto-Convection, Magnetic Field, Micropolar Fluid, Maxwell-Cattaneo Law
JOURNAL NAME:
Applied Mathematics,
Vol.1 No.6,
December
27,
2010
ABSTRACT: The effects of result from the substitution of the classical Fourier law by the non-classical Maxwell-Cattaneo law on the Rayleigh-Bénard Magneto-convection in an electrically conducting micropolar fluid is studied using the Galerkin technique. The eigenvalue is obtained for free-free, rigid-free and rigid-rigid velocity boundary combinations with isothermal or adiabatic temperature on the spin-vanishing boundaries. The influences of various micropolar fluid parameters are analyzed on the onset of convection. The classical approach predicts an infinite speed for the propagation of heat. The present non-classical theory involves a wave type heat transport (SECOND SOUND) and does not suffer from the physically unacceptable drawback of infinite heat propagation speed. It is found that the results are noteworthy at short times and the critical eigenvalues are less than the classical ones.