Effect of gravity modulation on the onset of thermal convection in rotating fluid and porous layer

摘要: The combined effect of gravity modulation and rotation on the onset thermal convection in a horizontal fluid layer fluid-saturated porous is studied analytically using linear stability theory. regular perturbation method based small amplitude employed to compute critical value Rayleigh number wavenumber. We considered present paper only synchronous mode. correction calculated as function Taylor number, Prandtl Darcy frequency modulation, normalized porosity, viscosity ratio. It shown that general produces stabilizing case viscous both destabilizing effects Brinkman while it layer. low found have significant system. can be advanced or delayed by proper tuning various governing parameters. results limit flow are derived degenerate cases model.