Department of Energy, National Engineering School of Monastir
génie Energétique, Ecole Nationale d'Ingénieurs de Monastir
genie Energetique, Ecole Nationale d'Ingenieurs de Monastir
energy department, National Engineering School of Monastir
Entropy generation of double diffusive natural convection in a three dimensional differentially heated enclosure has been performed numerically. Vertical walls of enclosure are heated differentially and remaining walls are adiabatic. The obtained results were presented via iso-concentration, iso-temperatures, velocity vector projection, particle trajectories, velocity profiles, iso-entropy, local Nusselt and Sherwood numbers, average Nusselt and Sherwood numbers and Bejan numbers at different value of buoyancy ratio (-2 ≤ N ≤ 2) and Rayleigh numbers (103≤ Ra ≤ 105). The Lewis number is fixed at Le = 2. It is found that both Rayleigh number and buoyancy ratio play dominant role on entropy generation and heat and mass transfer as well as fluid flow. A special case occurred between -1.5 ≤ N ≤ -1 and complex structure is observed.