| Abstract: | A penalty function upwind finite element method is describe in this paper for diffusive convection problem in temperature and salinity double-diffusive system. With good stability and two-order accuracy, the method was directly employed to the original equations,and tested in a square cavity with constant lateral heating. The steady-state results are approximate to the tendency of the time-dependent results by pressure-velocity (PV) coupling method. Nunerical simulation in a square cavity with adiabatic baffle and constant lateral heating was achieved with distribution of stream function, temperature and concentration isocontours under Thermal Raleigh Number Re= 106 and the thermal buoyancy ratio covering the ramp of N = 1, 3, 5, 7. Meanwhile, the effects of N and the adiabatic baffle to the fluid field were ho discussed. |
