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Effect of rotation on thermal convection in micropolar fluids in porous medium. (English) Zbl 0914.76035
Summary: We investigate the thermal instability of micropolar fluids heated from below in the presence of uniform rotation in porous medium. It is found that the coupling between thermal and micropolar effects, uniform rotation and permeability may introduce oscillatory motions in the system. The increase in Rayleigh number for stationary convection and decrease in Rayleigh number for overstability with the increase in permeability are depicted graphically. The Rayleigh number is found to increase with the increase in rotation.

76E15Convective instability (fluid mechanics)
76U05Rotating fluids
76A05Non-Newtonian fluids
80A20Heat and mass transfer, heat flow
76S05Flows in porous media; filtration; seepage