无界区域上轴对称Stokes绕流的混合有限元方法

计算物理 ›› 1990, Vol. 7 ›› Issue (3): 294-302.

无界区域上轴对称Stokes绕流的混合有限元方法

吴望一, 梁镭, 郭向东

北京大学力学系 100871

收稿日期:1989-10-23 出版日期:1990-09-25 发布日期:1990-09-25
基金资助:
高等学校科学技术基金资助课题

THE MIXED FINITE ELEMENT METHOD FOR AXISYMMETRIC STOKES FLOW ON UNBOUNDED DOMAINS

Wu Wangyi, Liang lei, Guo Xiangdong

Department of Mechanics, Peking University

Received:1989-10-23 Online:1990-09-25 Published:1990-09-25

摘要/Abstract

摘要： 本文讨论无界区域上轴对称Stokes绕流边值问题的有限元近似解。为了克服边界无界性所带来的困难,本文将传统的分析方法与有限元法相结合,首先将问题化为一个等价的有界区域上的边值问题,然后用有限元方法求得这个等价问题的近似解。作为算例,本文计算了圆球的Stokes绕流,并给出其近似解的误差分析。

关键词: 轴对称Stokes绕流, 混合有限元方法

Abstract: This paper deals with the finite element approximation of the axisymmetric Stokes flow on unbounded domains. In order to overcome the difficulties caused by the unbounded domains, the finite element method is combined with the classical analytical method and the equivalent boundary value problem on bounded domains is obtained, which is solved numerically by the finite element techneque. As an example, the Stokes flow around the sphere is calculated and the error estimate of the approximate solutions is given.

Key words: axisymmetric Stokes flow, mixed finite element method

吴望一, 梁镭, 郭向东. 无界区域上轴对称Stokes绕流的混合有限元方法[J]. 计算物理, 1990, 7(3): 294-302.

Wu Wangyi, Liang lei, Guo Xiangdong. THE MIXED FINITE ELEMENT METHOD FOR AXISYMMETRIC STOKES FLOW ON UNBOUNDED DOMAINS[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1990, 7(3): 294-302.