Effect Of Rheological Carreau-yasuda Parameters On Double Diffusive Convection In A Square Cavity Enclosure Submitted To Gradient Of Temperature And Concentration

Résumé: This paper presents a numerical study of doubly diffusive natural convection in an inclined square cavity filled with a non-Newtonian fluid subjected to a temperature and concentration gradient on the active walls, while the other walls are impermeable and adiabatic, are presented in this study. Any approximation of asymptotic parallel flow is applied to determine the onset of subcritical convection. The Boussinesq approximation and the transport equations are solved by a finite difference method. The numerical simulation presented here covers a wide range of thermal Rayleigh number ( , the rheological parameters of the Carreau-Yasuda fluids ( and , and the inclination angel, , . The Nusselt and Sherwood transfer rates were improved by decreasing the power-law index n and the parameter a, or by increasing the time constant, E. Detailed results of the Nusselt and Sherwood numbers are presented and discussed.

Publié dans la revue: مجلة جامعة وهران 2