## MIXED CONVECTION HEAT TRANSFER IN A LID-DRIVEN CAVITY WITH A ROTATING CIRCULAR CYLINDER
## 摘要Mixed convection heat transfer in a lid-driven cavity with a rotating cylinder was analyzed numerically for various pertinent parameters. Such parameters include Richardson number, non-dimensional angular velocity of the cylinder, and its direction. The governing equations were solved using the average weighted residuals of Galerkin method. The numerical method used in this investigation was validated against published results in the literature. The results of this investigation were presented in terms of streamlines, isotherms, and average Nusselt number. The present results illustrated that the average Nusselt number was found to depend on the direction of the angular velocity. The average Nusselt number increased with an increase in the clockwise angular velocity of the cylinder for various Richardson numbers. However, it decreased with an increase in the counterclockwise until reached a critical velocity where average Nusselt number increased with an increase in the angular velocity. This study illustrated that the maximum heat transfer can be achieved when placing a rotating cylinder inside a cavity compared with non-rotating cylinder. |

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