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New nonconforming finite element method for solving transient Naiver-Stokes equations

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  • 1. School of Mathematics Sciences, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China;
    2. School of Mathematics, Sichuan University, Chengdu 610064, P. R. China

Received date: 2012-11-22

  Revised date: 2013-06-14

  Online published: 2014-02-18

Abstract

For transient Naiver-Stokes problems, a stabilized nonconforming finite element method is presented, focusing on two pairs inf-sup unstable finite element spaces, i.e., PNC1 /PNC1 triangular and PNQ1 /PNQ1 quadrilateral finite element spaces. The semiand full-discrete schemes of the stabilized method are studied based on the pressure projection and a variational multi-scale method. It has some attractive features: avoiding higher-order derivatives and edge-based data structures, adding a discrete velocity term only on the fine scale, being effective for high Reynolds number fluid flows, and avoiding increased computation cost. For the full-discrete scheme, it has second-order estimations of time and is unconditionally stable. The presented numerical results agree well with the theoretical results.

Cite this article

XIE Chun-Mei;FENG Min-Fu . New nonconforming finite element method for solving transient Naiver-Stokes equations[J]. Applied Mathematics and Mechanics, 2014 , 35(2) : 237 -258 . DOI: 10.1007/s10483-014-1787-6

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