多体运动大流场计算的动态差分网格

提出无限大流场中多体运动计算的动态差分网格．无限大流场用充分大的人工边界模拟，而运动物体表面是流场的内边界．对于流场的差分网格，外边界（人工边界）点是固定的，内边界点则随时间而移动，因此流场的差分网格是动态的．几个有代表性的算例验证了动态差分网格的有效性．

Dynamic Difference Mesh for Multi-Body Movement in Infinite Fluid Field

This paper proposes a dynamic difference mesh for computation of multi-body movement in the infinite fluid filed. The infinite fluid field is simulated by the artificial boundary which has sufficient size. The internal boundary in the computational field is the moving body's surface. For the difference mesh of the fluid field, the external boundary (artificial boundary) points are fixed, but the internal boundary points are varied with time. So the difference mesh of the fluid field is dynamic. Some examples demonstrate the validity of the difference mesh.