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Overlapping Schwarz methods for mixed linear elasticity and Stokes problems

机译:混合线性弹性和Stokes问题的重叠Schwarz方法

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摘要

Overlapping Schwarz preconditioners are introduced and studied for saddle point problems with a penalty term, such as Stokes equations and mixed formulations of linear elasticity. These preconditioners are based on the solution of local saddle point problems on overlapping subdomains and the solution of a coarse saddle point problem. Numerical experiments show that these are parallel and scalable preconditioners, since the rate of convergence of the preconditioned operator is independent of the mesh size h, the number of subdomains N, and the penalty parameter.
机译:引入重叠的Schwarz预处理器并研究带有惩罚项的鞍点问题,例如斯托克斯方程和线性弹性的混合公式。这些预处理器基于重叠子域上的局部鞍点问题的解决方案和粗糙鞍点问题的解决方案。数值实验表明,这些是并行且可扩展的预处理器,因为预处理算子的收敛速度与网格大小h,子域数N和惩罚参数无关。

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