Convergence of the boundary integral method for interfacial Stokes flow

Convergence of the boundary integral method for interfacial Stokes flow
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界面斯托克斯流边界积分法的收敛性

DOI:
10.1090/mcom/3787
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发表时间:
2023
影响因子:
2
通讯作者:
Zhang, Keyang
Zhang, Keyang
中科院分区:
数学2区
文献类型:
--
作者:
Ambrose, David;Siegel, Michael;Zhang, Keyang

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边界积分数值方法是研究界面Stokes流动的最精确的方法之一,应用广泛。它们的优点是,只有域的边界必须离散,这减少了离散点的数量,并允许处理复杂的接口。尽管他们的流行,有没有分析这些方法的界面斯托克斯流的收敛性。在实践中,边界积分公式的离散化的稳定性可以敏感地依赖于离散化的细节和数值滤波器的应用。我们提出了一个收敛性分析的边界积分方法的Stokes流,侧重于一个相当普遍的方法计算的演变的弹性胶囊或粘性下降的二维应变和剪切流。分析阐明了数值滤波器在实际计算中的作用。引用
Boundary integral numerical methods are among the most accurate methods for interfacial Stokes flow, and are widely applied. They have the advantage that only the boundary of the domain must be discretized, which reduces the number of discretization points and allows the treatment of complicated interfaces. Despite their popularity, there is no analysis of the convergence of these methods for interfacial Stokes flow. In practice, the stability of discretizations of the boundary integral formulation can depend sensitively on details of the discretization and on the application of numerical filters. We present a convergence analysis of the boundary integral method for Stokes flow, focusing on a rather general method for computing the evolution of an elastic capsule or viscous drop in 2D strain and shear flows. The analysis clarifies the role of numerical filters in practical computations. References
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