Numerical Investigation of Mixed Convection in Two-Sided Lid-Driven Square Cavity with Wavy Walls

This paper reviews numerical investigation of steady states, mixed convection flow within a two-sided lid driven cavity with wavy adiabatic side walls and moving both top hot wall and bottom cold wall. Constant Grashohf number (Gr=10^4) has induced constant wall temperatures while varying Richardson number (Ri=0.1, Ri=1, and Ri=10) has generated different streamlines and temperature patterns in which we could deduce the fact that heat transfer rate is higher in force convection dominant regime (Ri<1). In addition, we have investigated cavities with wavy walls in force convection dominant regime (Ri <1) with different pitch numbers and different pick numbers and have perceived as pitch number decreases, recirculation of flow become more arduous and heat transfer rate decreases. Finally, we have considered cavities with wavy walls with different pitch numbers and different pick numbers at Ri>=1. What we have observed, is increasing of Nusselt number by decreasing of pitch numbers and decreasing of pick numbers. We also have plotted vertical velocity profile along the cavity at horizontal midline for first case and Nusselt number variation along the cavity on hot wall for each case.

کلیدواژه ها:

Lid-driven cavity ، Mixed convection ، Wavy walls ، Average Nusselt number