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The non-symmetric Nitsche method for the parameter-free imposition of weak boundary and coupling conditions in immersed finite elements
Computer Methods in Applied Mechanics and Engineering
  • Dominik Schillinger, University of Minnesota
  • Isaac Harari, Tel Aviv University
  • Ming-Chen Hsu
  • David Kamensky, University of Texas at Austin
  • Stein K. F. Stoter, University of Minnesota
  • Yue Yu, Lehigh University
  • Ying Zhao, Technische Universität Darmstadt
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
9-1-2016
DOI
10.1016/j.cma.2016.06.026
Abstract

We explore the use of the non-symmetric Nitsche method for the weak imposition of boundary and coupling conditions along interfaces that intersect through a finite element mesh. In contrast to symmetric Nitsche methods, it does not require stabilization and therefore does not depend on the appropriate estimation of stabilization parameters. We first review the available mathematical background, recollecting relevant aspects of the method from a numerical analysis viewpoint. We then compare accuracy and convergence of symmetric and non-symmetric Nitsche methods for a Laplace problem, a Kirchhoff plate, and in 3D elasticity. Our numerical experiments confirm that the non-symmetric method leads to reduced accuracy in the L2" role="presentation"> error, but exhibits superior accuracy and robustness for derivative quantities such as diffusive flux, bending moments or stress. Based on our numerical evidence, the non-symmetric Nitsche method is a viable alternative for problems with diffusion-type operators, in particular when the accuracy of derivative quantities is of primary interest.

Comments

This is a manuscript of an article published as Schillinger, Dominik, Isaac Harari, Ming-Chen Hsu, David Kamensky, Stein KF Stoter, Yue Yu, and Ying Zhao. "The non-symmetric Nitsche method for the parameter-free imposition of weak boundary and coupling conditions in immersed finite elements." Computer Methods in Applied Mechanics and Engineering 309 (2016): 625-652. DOI: 10.1016/j.cma.2016.06.026. Posted with permission.

Copyright Owner
Elsevier B.V.
Language
en
File Format
application/pdf
Citation Information
Dominik Schillinger, Isaac Harari, Ming-Chen Hsu, David Kamensky, et al.. "The non-symmetric Nitsche method for the parameter-free imposition of weak boundary and coupling conditions in immersed finite elements" Computer Methods in Applied Mechanics and Engineering Vol. 309 (2016) p. 625 - 652
Available at: http://works.bepress.com/ming-chen_hsu/23/