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arXiv 2008.07608math.NAcs.NA
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轴对称区域上斯托克斯方程的一种近似框架

A framework for approximation of the Stokes equations in an axisymmetric domain

N. Ericsson

摘要:

我们发展了一个求解轴对称区域中定常不可压缩斯托克斯方程的框架。通过傅立叶展开的角度变量,三维斯托克斯问题减少到一个等价的,可数族的解耦的二维问题。通过三维Sobolev范数的分解,我们得到了二维问题的自然变分空间,并证明了变分公式是适定的。我们分析了由于傅立叶截断的误差,并得出结论,对于足够规则的数据,它足以解决少量的二维问题。

英文摘要:

We develop a framework for solving the stationary, incompressible Stokes equations in an axisymmetric domain. By means of Fourier expansion with respect to the angular variable, the three-dimensional Stokes problem is reduced to an equivalent, countable family of decoupled two-dimensional problems. By using decomposition of three-dimensional Sobolev norms we derive natural variational spaces for the two-dimensional problems, and show that the variational formulations are well-posed. We analyze the error due to Fourier truncation and conclude that, for data that are sufficiently regular, it suffices to solve a small number of two-dimensional problems.

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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