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arXiv 1807.00328math.NAcs.NAcs.SCmath.RA
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一种适用于稳态斯托克斯流的强一致有限差分方案及其修正方程

A Strongly Consistent Finite Difference Scheme for Steady Stokes Flow and its Modified Equations

Saratov State University(萨马拉国立大学);Joint Institute for Nuclear Research(联合核子研究所);Peoples’ Friendship University of Russia(俄罗斯人民友谊大学);King Abdullah University of Science and Technology(阿卜杜拉国王科技大学)

Yury A. Blinkov, Vladimir P. Gerdt, Dmitry A. Lyakhov, Dominik L. Michels

AI总结:

本文提出并分析了适用于稳态二维斯托克斯流的强一致二阶有限差分方案,通过结合有限体积法、差分消元和数值积分技术,构建了压力泊松方程的显式形式,并通过差分理想与微分理想之间的关联证明了方案的强一致性。

摘要:

我们构建并分析了适用于稳态二维斯托克斯流的强一致二阶有限差分方案。压力泊松方程被显式地纳入该方案中。我们的方法由前两位作者提出,基于有限体积法、差分消元和数值积分的结合。我们利用微分与差分詹森/格罗伯纳基的技巧。为了证明所生成方案的强一致性,我们关联了由斯托克斯方程中的多项式生成的微分理想与由所构造差分方案中的多项式生成的差分理想。此外,我们计算了所获方案的修正微分系统,并通过考虑该系统分析了该方案的精度和强一致性。我们还对所提方案与已建立的标记与单元方法进行了评估。

英文摘要:

We construct and analyze a strongly consistent second-order finite difference scheme for the steady two-dimensional Stokes flow. The pressure Poisson equation is explicitly incorporated into the scheme. Our approach suggested by the first two authors is based on a combination of the finite volume method, difference elimination, and numerical integration. We make use of the techniques of the differential and difference Janet/Groebner bases. In order to prove strong consistency of the generated scheme we correlate the differential ideal generated by the polynomials in the Stokes equations with the difference ideal generated by the polynomials in the constructed difference scheme. Additionally, we compute the modified differential system of the obtained scheme and analyze the scheme's accuracy and strong consistency by considering this system. An evaluation of our scheme against the established marker-and-cell method is carried out.

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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