RT Journal Article ID 4435968c44e3e0eb A1 Marzougui, Souad A1 Mchirgui, Ali A1 Magherbi, Mourad T1 DOUBLE DIFFUSIVE NATURAL CONVECTION AND ENTROPY GENERATION THROUGH A TRAPEZOIDAL POROUS CAVITY JF Special Topics & Reviews in Porous Media: An International Journal JO STRPM YR 2020 FD 2020-06-12 VO 11 IS 2 SP 189 OP 202 K1 trapezoidal porous cavity K1 heat and mass transfer K1 numerical method K1 entropy generation AB The present paper provides a numerical investigation about heat and mass transfer and entropy generation in a trapezoidal porous cavity saturated with a binary mixture of perfect gas and submitted to double diffusive convection. The analysis is performed using Darcy−Brinkman formulation with the Boussinesq approximation. The set of coupled equations of mass, momentum, energy, and species conservation are solved using the control volume finite-element method. Effects of buoyancy ratio and medium permeability and of the aspect ratio of the cavity on different irreversibilities are studied. It was found that entropy generation considerably depends on the buoyancy forces and reaches a minimum for a specific value of buoyancy ratio. A balance between Darcy viscous dissipation and other irreversibilities affect the entropy generation behavior. The variation of total entropy generation could be driven by heat transfer and diffusion or by fluid friction according to aspect ratio and Darcy number values. PB Begell House LK https://www.dl.begellhouse.com/journals/3d21681c18f5b5e7,2fac66170857bfec,4435968c44e3e0eb.html