Nonequilibrium Natural convection in a Differentially Heated Cavity Filled With a Saturated Porous Matrix

摘要

Steady-state natural convection in an enclosure filled with a satu- rated porous medium is investigated numerically. Brinkman- Forchheimer's extension of Darcy flow with a nonequilibrium Model is used in the analysis. The paper intends to address the Validity of the equilibrium model for natural convection. The pre- Dicted results indicated that the equilibrum model is difficult to Justify for non-Darcy regime and when the solid thermal conduc- Tivity is higher than the fluid thermal conductivity. The maximum Differences in the temperatures between the two phases take place At the bottom-life corner and due to skew-symmetry of the prob- lem at the upper-right corner.