Numerical simulation of double diffusive laminar mixed convection in shallow inclined cavities with moving lid

Abstract

A numerical investigation of double-diffusive laminar mixed convection in an inclined cavity has been studied numerically. The top lid was considered to move in both directions to introduce the forced convection effect. In addition, the solutal and thermal buoyancy forces are sustained by maintaining the top lid and the bottom surface at uniform temperatures and concentrations, but their values for the top lid are higher than those at the bottom surface. The laminar flow regime is considered under steady state conditions. Moreover, the transport equations for continuity, momentum, energy and mass transfer are solved. The streamlines, isotherms and iso concentrations as well as both local and average Nusselt and Sherwood numbers were studied for the hot lid. The effects of inclination of the cavity on the flow, thermal and mass fields are investigated for inclination angles ranging from 0° to 30°. The study covers a wide range for 0.1 ⩽ Le ⩽ 10 and −10 ⩽ N ⩽ 10. Through this investigation, the following parameters are kept constant: The aspect ratio at 10, Prandtl number at six representing water. A comparison was made with published results and a good agreement was found.

Keywords: Double-diffusive flow - Heat and mass transfer - Inclined cavities - Lid driven cavity - Mixed convection - Numerical simulation