多重网格法及其在回流流动计算中的应用

Application of Multi-grid Technique for Recirculating Flows

结合多重网格方法 ,采用同位网格体系的有限体积法建立了二维不可压缩流动的k -ε紊流数值模型 ,对流项和扩散项均采用中心差分格式离散 ,流速、压力采用通用的SIMPLE压力校正方法求解 ,代数方程组则利用强隐式方法SIP求解。对空腔流和突扩流两种典型回流流动进行模拟 ,证明了所建立模型的有效性和可信性。

A finite volume multi grid procedure for prediction of laminar and turbulent flows is presented in the paper. The pressure and velocity fields are coupled with the semi implicit pressure correction algorithm (SIMPLE) combined with SIP interpolation techniques. The full multi grid method enables efficient and accurate calculations on every fine grid. Two typical recirculating flows are simulated, and the results show good agreement with experiment.