This paper studies convective heat transfer in an unsteady vertical porous channel with suction/injection in the presence of heat generation. A semi-implicit finite difference method was employed to solve the Cartesian coordinate forms of the governing equations. Subsequently, the entropy generation number for varying values of intrinsic parameters, as well as the temperature and velocity profile, Bejan number and irreversibility of the system were successfully calculated. We observed that the convective cooling by suction is more effective on thermal properties than injection convective cooling. Hence, the process of entropy can be enhanced by convective heat transfer and viscous dissipation.

本文研究在存在热量的情况下，在具有吸入/注入的非稳态垂直多孔通道中的对流传热。采用半隐式有限差分法求解控制方程的笛卡尔坐标形式。随后，成功地计算出固有参数变化的熵生成数，以及温度和速度分布图，Bejan数和系统的不可逆性。我们观察到，通过吸气进行对流冷却比注射对流冷却对热性能更有效。因此，对流传热和粘性耗散可以增强熵的过程。