Keywords: double diffusive convection, entropy generation, numerical methods, Soret effect, Dufour effect, binary gas mixtures, buoyancy forces, heat transfer, mass transfer
Influence of Soret and Dufour effects on entropy generation in transient double diffusive convection
The influence of Soret and Dufour effects on entropy generation in transient double diffusive convection of a binary gas mixture for the special case of opposing buoyancy forces with equal intensity is numerically studied. It is an interesting case since it corresponds to minimum entropy generation. For moderate thermal Grashof number (GrT = 104), Soret and Dufour parameters induce a slight increase of entropy generation, for relatively higher thermal Grashof number (GrT = 5 × 104), oscillatory behaviour of entropy generation is obtained. Contributions of Soret and Dufour effects on entropy generation, on heat and mass transfer are discussed.