二维结构/非结构混合网格的生成及其流场模拟

2D HYBRID STRUCTURED-UNSTRUCTURED GRID GENERATION AND FLOW SIMULATION

采用分区求解方法在二维结构 /非结构混合网格中对粘性绕流作了数值模拟。利用层面推进法生成绕物体的 O形结构网格 ,利用推进阵面法在结构网格外生成非结构网格。在结构网格区内 ,采用 B-L湍流模型 ,求解雷诺平均 N-S方程。在非结构网格区内求解 Euler方程。两区的解通过在交界面上满足通量守恒条件进行耦合。

The domain decomposition technique is used in a 2D structured/unstructured grid to simulate the viscous flow field in the present paper. The O type structured grid near the neighbor of bodies is generated by using the advancing layer method and the unstructured grids are created by using the advancing front method outside the structured grid. The Reynolds averaged N S equations are solved with implementation of the Baldwin Lomax turbulence model in the structured grid. The Euler equations are solved in the unstructured grid. Two regions' solutions are coupled by using the condition on the interface for keeping the flux conservation. Numerical results show the effectiveness and applicability of the present method.