Numerical Study on the Influence of Solutal Buoyancy on Mixed Convection Heat and Mass Transfer in Skewed Domain

This study examines how variations in solutal buoyancy force affect mixed convection heat and mass transfer in a skewed domain. The thermal buoyancy is fixed at 105 for all the cases and mixed convection is induced due to the rotation of a cylinder in clockwise and counterclockwise directions. The solutal buoyancy is varied by changing the buoyancy ratio (0.5, 1, and 1.5). In the present investigation, OpenFOAM 5.0 has been employed to compile the heat and mass transfer solver by coupling energy and concentration equations with Soret and Dufour parameters. The Navier-Stokes equation along with Boussinesq term is included for mixed convection flow analysis. The cylinder rotation is kept constant to maintain the Reynolds number at 1000 at a fixed Richardson number of 1. It is found that for natural convection flow with a stationary cylinder, the heat and mass transfer are higher and stable at low buoyancy ratios. However, for mixed convection flow cases, the increase in heat and mass transfer is maximum and periodic with higher buoyancy ratios.