Throughflow and g-jitter effects on binary fluid saturated porous medium

doi:10.1007/s10483-015-1984-9

Abstract

Abstract: A non-autonomous complex Ginzburg-Landau equation (CGLE) for the finite amplitude of convection is derived, and a method is presented here to determine the amplitude of this convection with a weakly nonlinear thermal instability for an oscillatory mode under throughflow and gravity modulation. Only infinitesimal disturbances are considered. The disturbances in velocity, temperature, and solutal fields are treated by a perturbation expansion in powers of the amplitude of the applied gravity field. Throughflow can stabilize or destabilize the system for stress free and isothermal boundary conditions. The Nusselt and Sherwood numbers are obtained numerically to present the results of heat and mass transfer. It is found that throughflow and gravity modulation can be used alternately to heat and mass transfer. Further, oscillatory flow, rather than stationary flow, enhances heat and mass transfer.

Key words: gravity modulation, throughflow, weakly nonlinear theory, complex Ginzburg-Landau equation (CGLE)

2010 MSC Number:

O343.6

P. KIRAN. Throughflow and g-jitter effects on binary fluid saturated porous medium. Applied Mathematics and Mechanics (English Edition), 2015, 36(10): 1285-1304.

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