A comparison of mortar and Nitsche techniques for linear elasticity
A comparison of mortar and Nitsche techniques for linear elasticity
复制标题
砂浆和尼采技术线弹性的比较
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
B. Wohlmuth
中科院分区:
文献类型:
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作者:
Achim Fritz;S. Hüeber;B. Wohlmuth
Domain decomposition techniques provide powerful tools for the numerical approximation of partial differential equations. In this paper, we analyze the Nitsche method for the Lamé operator, establish a priori error estimates and compare this method with the mortar method using dual Lagrange multiplier spaces. Both methods can be applied to non-matching triangulations. We use a multigrid algorithm to solve the algebraic systems. Although we have a mesh dependent bilinear form, optimal $\mathcal{W}$-cycle convergence rates can be obtained. Numerical results for the two methods with linear and quadratic finite elements illustrate the performance and flexibility of these nonconforming discretization techniques.