热质渗透壁面饱和多孔介质通道流动与热质传递的数值模拟

利用数值模拟方法研究了多孔介质中存在温度梯度、浓度梯度并具有热质渗透壁面时的受迫对流对传热传质的影响。采用有限容积法在同位网格上离散控制多孔介质内流体流动与热质传递方程守恒方程(即N-S)，对流项采用二阶精度的QUICK格式，扩散项采用中心差分格式。利用SIMPLE算法求解压力和速度耦合问题。利用所发展的程序研究了在不同孔隙率，不同的温度、浓度边界条件下，流场、温度场和浓度场以及Nu和Sh的变化规律。

Forced convection heat and mass transfer in saturated porous channel with heat and mass permeable wall

Forced convection heat and mass transfer in a saturated porous media channel with wall through which heat and mass transfer was numerically simulated by using the Darcy model. The governing equations were discretised on collocated grid by means of the finite volume method. The QUICK scheme has been used in the convective terms while the differencing scheme in diffusion terms. The SIMPLE algorithm had been employed to decouple the velocities and pressure. With the developed code, simulations dealing with flow, temperature and concentration fields were carried out in different porosities, boundary temperatures and concentrations. Meanwhile, the effects of these conditions on Nusselt and Sherwood numbers had been obtained. The results show that the heat and mass permeable wall has an insignificance effect on reducing heat transfer in the front of the channel with the heated section.