study of heat and mass transport in bénard-darcy convection with g-jitter and variable viscosity liquids in a porous layer with internal heat source

In this research article, we investigated the weakly nonlinear effect of gravity modulation for the temperature dependent viscous fluid in a horizontal porous layer in the presence of internal heat source. we use power series expansion in terms of the amplitude of gravity modulation, which is considered to be small for doublediffusive convection in porous media. we graphically show the effect of internal heat source, solute rayleigh number, lewis number, vadász number, thermorheological parameter, the amplitude of gravity modulation, the frequency of modulation on the heat and mass transfer using ginzburg-landau equation. the effect of gravity modulation is found significant and is more effective for the low values of frequency of modulation.