自适应直角坐标网格方法在对流换热数值模拟中的应用

Application of Auto-Adaptive Cartesian Grid Approach to Numerical Simulation of Convection

复杂几何边界是对流换热计算面临的主要难点之一。自适应直角坐标网格方法可以比较方便的处理复杂几何边界,但其应用目前主要集中于可压无粘流的Euler方程、可压粘性流的Navier-Stokes方程的外部绕流计算。本文应用自适应直角坐标网格方法计算了两个不可压内流对流换热算例,并把计算结果同商用CFD软件STAR-CD的计算结果进行了对比。自适应直角坐标网格方法在本文的两个算例中得到了同STAR-CD一致的结果。这说明采用该方法数值模拟对流换热问题是适用的。

It is difficult to deal with complex geometric regions for numerical simulation of convections. The auto-adaptive Cartesian grid approach is able to tackle the problem easily. But, up to now, it is mainly applied to solving compressible outer flows of Euler equations and Navier-Stokes equations. This paper simulated two convection cases of incompressible inner flow. The two cases were also simulated by STAR-CD, a commercial CFD code. The simulation results by auto-adaptive Cartesian grid approach and STAR-CD were compared and consistencies were shown. So the auto-adaptive Cartesian grid approach is suitable to be applied to simulating convection problems.