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arXiv 2407.15971math.NAcs.NAmath.AP
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修正压力Dirichlet边界条件下Stokes问题的适定性

Well-posedness of the Stokes problem under modified pressure Dirichlet boundary conditions

Igor Tominec, Josefin Ahlkrona, Malte Braack

AI总结:

本文证明在速度和压力同时于边界消失的修正压力Dirichlet条件下Stokes问题适定,通过推广Nečas不等式得到依赖于带状区域体积倒数的先验估计,并经数值实验验证,为模型耦合与区域分解提供指导。

摘要:

本文证明了当速度和压力在域边界上同时消失时,Stokes问题是适定的。这一结果通过将Nečas不等式推广到在覆盖边界的小带状区域内消失的平方可积函数而获得。研究发现,相关的先验压力估计依赖于带状区域体积的倒数。数值实验证实了这些发现。基于这些结果,本文为在模型耦合和区域分解方法中应用消失压力边界条件提供了指导。

英文摘要:

This paper shows that the Stokes problem is well-posed when velocity and pressure simultaneously vanish on the domain boundary. This result is achieved by extending Nečas' inequality to square-integrable functions that vanish in a small band covering the boundary. It is found that the associated a priori pressure estimate depends inversely on the volume of the band. Numerical experiments confirm these findings. Based on these results, guidelines are provided for applying vanishing pressure boundary conditions in model coupling and domain decomposition methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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