计算物理 ›› 1986, Vol. 3 ›› Issue (2): 217-226.

• 论文 • 上一篇    下一篇

解不可压缩流体力学问题的降阶法——Ⅱ.空间Vh的基函数和误差估计

于欣   

  1. 中国科学院力学研究所
  • 收稿日期:1985-09-06 出版日期:1986-06-25 发布日期:1986-06-25

A DIMENSIONAL REDUCTION METHOD FOR INCOMPRESSIBLE FLUID DYNAMICS Ⅱ.THE BASIS OF V~h AND THE ERROR ESTIMATES

Yu Xin   

  1. Institute of Mechanics, Academia Sinica
  • Received:1985-09-06 Online:1986-06-25 Published:1986-06-25

摘要: 本文对于一大类数值求解二维Navier-Stokes方程边值问题的有限元格式给出了零散度空间Vh的一组简单基函数,讨论了速度的数值误差对压力的数值解的影响,并提出一个改进算法。

Abstract: This paper is the second in a series of papers in which we present a new finite element method for incompressible fluid dynamics-a dimensional reduction method. In this paper, we give a simple basis of Vh for a class of finite element schemes for solving Navier-Stokes equations in a bounded domain Ω⊂R2, discuss how the numerical error of the velocity field affects the numerical solution of the pressure, and present an improved algorithm.