粘性流体对流换热问题用直角坐标网格的解法

Method with Cartesian Gridfor Simulating Convecti on Heat Transfer of Viscous Fluid

研究了非结构化直角坐标网格全贴体求解粘性不可压流体自然对流换热问题。该方法在于利用直角坐标网格但通过在边界附近保留不规则控制体,使得算法是完全贴体的。利用此数值方法对二维倾斜空腔内的自然对流及上固体边界移动时的对流换热问题进行计算,并与STAR-CD的计算结果进行比较。对比结果表明,该方法计算的结果与STAR-CD的结果很接近,可以满足一定精度要求。

A body fitted method with unstructured Cartesian grids for simulating natural convection heat transfer of viscous fluid was studied. Cartesian grids were used and irregular volumes on boundary vicinity were reserved, and thus these grids were fully body fitted. Based on this method, natural convection-diffusion and the convection heat transfer with moving upper boundary in the 2-D inclined cavity were computed. The computed results are compared with those of STAR-CD and show good coincidence.