Exploration of the effects of anisotropy and rotation on Rayleigh–Bénard convection of nanoliquid-saturated porous medium using general boundary conditions

Abstract

This paper presents an analysis of Rayleigh–Bénard convection (RBC) of a Newtonian-nanoliquid-saturated anisotropic porous medium in the presence of rotation (Rayleigh–Bénard–Taylor convection). The investigation is performed using non-classical boundary conditions. The effect of various parameters on the onset of convection is presented graphically. The system sees stabilisation due to an increase in the rotation rate and thermal anisotropy parameter whereas the system destabilises due to an increase in the mechanical anisotropy parameter. The results of 82 limiting cases can be extracted from the current work. The results of free-free, rigid-free and rigid-rigid isothermal/adiabatic boundaries are obtained from the present study by considering appropriate limits. The results of the limiting cases of the present study are in excellent agreement with those observed in earlier investigations.