DOUBLE-DIFFUSIVE CONVECTION-REACTION FLOW IN A SQUARE ENCLOSURE FILLED WITH POROUS MEDIUM

Abstract

In this work, we analyze the double-diffusive convection-reaction of a binary mixture in a square enclosure filled with a porous media, with constant temperatures and concentrations at the two vertical walls and adiabatic and impermeable horizontal walls. The boundaries of the enclosure are under chemical equilibrium. The porous medium is assumed to be in local thermal equilibrium (LTE) state and the solubility of the dissolved salts depends on temperature. The two-dimensional steady-state flow rate is determined by a non-Darcy (Darcy-Brinkman) model, and the entire governing equations are solved using the usual SIMPLE-R finite-volume methodology. It has been found that as the reaction rate increases in the system the salt precipitation also increases, causing a decrease in overall mass transfer rate. Also, the chemical reaction tends to decrease the overall heat transfer-rate.