Convection onset within fluid saturated porous medium filling the horizontal cylindrical gap heating from below
The study of convection onset within viscous incompressible fluid saturated porous medium filling the gap between two horizontal coaxial cylinders is presented. The equilibrium stability with respect to perturbations of two types: in the form of two antisymmetric flows and in the form of through symmetric flow, - is investigated. The perturbations corresponding with symmetric flow are shown to be the most dangerous in any ratio of cylinders radiuses.