Numerical study of double diffusive mixed convection around a heated cylinder in an enclosure

This article reports numerical solution of the double diffusive mixed convection phenomena around a heated cylinder in an enclosure. The heated cylinder is located at the center of the enclosure with high temperature and concentration. The inlet flow with low temperature and concentration is located at the lower-left wall of the enclosure and the exit is at the upper-right wall. Other walls are assumed to be adiabatic. The influences of Lewis number Le, buoyancy ratio Br and Richardson number Ri on the double diffusive mixed convection are investigated while the Prandtl and Grashof numbers are kept at 0.7 and 1.4 × 10⁴, respectively. Streamlines, isotherms, isoconcentrations, and the local and average Nusselt number and Sherwood number under different parameters are reported to characterize the mixed convection in an enclosure.