CONVECTION INDUCED BY INCLINED THERMAL AND SOLUTAL GRADIENTS IN A SHALLOW HORIZONTAL LAYER OF A POROUS-MEDIUM

A theoretical examination is made of convection, induced by applied th ermal and solutal gradients inclined to the vertical, in a shallow hor izontal layer of a saturated porous medium. The horizontal components of these gradients induce a Hadley circulation, which becomes unstable when the vertical components are sufficiently large. A linear stabili ty analysis is carried out, and calculations are made using a low-orde r Galerkin approximation for the various modes of instability. The ori entation of the preferred mode and the other critical quantities are d etermined for representative parameter values.