多重网格法及其在回流流动计算中的应用

摘要

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SI P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 o f laminar and turbulent flows is presented in the paper. The pressure and veloci ty fields are coupled with the semi-implicit pressure correction algorithm (SIM PLE) combined with SIP interpolation techniques. The full multi-grid method ena bles efficient and accurate calculations on every fine grid. Two typical rec irculating flows are simulated, and the results show good agreement with experi ment.