关于二阶自适应开路边条件的进一步讨论  

A Comment on the Second Order Adaptive Open Boundary Condition

作　　者：邹光远[1] 陈耀松[1] 

机构地区：[1]北京大学力学系,北京100871

出　　处：《水动力学研究与进展（A辑）》1992年第3期350-358,共9页Chinese Journal of Hydrodynamics

摘　　要：本文对二阶自适应开路边条件(以下简称AOBC2)作了进一步的讨论。指出了对局部瞬时等价波方向(±k_x,k_y)~T的选取范围应有所限制,即要求k_x^2+k_y^2/2>0,且k_x^2≠k_y^2。由于在实际运用中,波的传播方向一般不会与人为边界近于平行,故这些限制不会影响本方法的使用价值。同更多的现有方法作比较,进一步证明了本方法的有效性。In this paper the limitation of the adaptive open boundary condition offered in the papers [7-9] is given. The critical local parameter involved in the mentioned method is its 'main' wave direction (kx,ky)T, which has to be chosen to meet the requirements that kx2-ky2/2>0 and kx2≠ 0.5. However, these additional requirements make no any practical limitations in practice. The advantage of the method over the others is demonstrated in test examples.

关 键 词：开路边条件 稳定性 自适应 

分 类 号：O352[理学—流体力学]