Vortex sheet approximation of boundary layers
Vortex sheet approximation of boundary layers
复制标题
边界层的涡片近似
DOI：
10.1016/0021-9991(78)90019-0
复制
发表时间：
1978
影响因子：
4.1
通讯作者：
A. Chorin
中科院分区：
文献类型：
--
作者：
A. Chorin
本文介绍一种无网格方法来逼近不可压边界层。计算单元是涡面的分段。该方法与早期的涡方法有关;简单性是以用普朗特边界层方程代替Navier-Stokes方程为代价实现的。本文还提出了一种新的生成边界涡量的方法，它可以与早期的涡量方法一起使用。所提出的应用包括（i）平板问题，和（ii）在一个模型缸-活塞组件，其中新的方法是用于近壁和改进版本的随机选择方法的内部使用的流动问题。新方法的一个有吸引力的特点是它可以很容易地被纳入混合算法。
A grid free method for approximating incompressible boundary layers is introduced. The computational elements are segments of vortex sheets. The method is related to the earlier vortex method; simplicity is achieved at the cost of replacing the Navier-Stokes equations by the Prandtl boundary layer equations. A new method for generating vorticity at boundaries is also presented; it can be used with the earlier vortex method. The applications presented include (i) flat plate problems, and (ii) a flow problem in a model cylinder-piston assembly, where the new method is used near walls and an improved version of the random choice method is used in the interior. One of the attractive features of the new method is the ease with which it can be incorporated into hybrid algorithms.