用贴体坐标方法计算后向台阶内圆柱绕流问题

Numerical formulation of incompressible viscous flow in back facing step including inner cylinder with body fitted coordinate system

本文采用涡量一流函数方法，应用贴体坐标技术来研究后向台阶粘性流动，利用作者提出的多连通区域分块计算方法研究了流动区域内含一圆柱体的粘性流动问题。在圆柱体表面上用粘性条件确定流函数值。得到后向台阶内绕流问题的数值解。此法可推广到求解有限区域内多体统流问题。

It is presented that numerical method with vorticity-stream function formulation adopts body fitted coordinate system and solves flow field in which the incompressible vicous flow pass a backward facing step including a inner cylinder by using a method decomposed full domain to multi-blocks.The stream function on cylinder is determined by real viscous boundary condition.The numerical method presented here can be extented to the flow over multi-bodies in finite domain.