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arXiv 1604.04532math.NAcs.NAmath.DSnlin.PSphysics.flu-dyn
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用于稳态不可压缩流的自适应预处理程序

An adaptive preconditioner for steady incompressible flows

University of Leeds(利兹大学)

C. Beaume

AI总结:

本文提出了一种自适应预处理程序,用于不可压缩纳维-斯托克斯流的数值持续性计算,通过连续参数将恒等映射转换为斯托克斯预处理程序,并基于一阶欧拉时间离散化方案。

摘要:

本文描述了一种用于不可压缩纳维-斯托克斯流数值持续性的自适应预处理程序。该预处理程序通过连续参数将恒等映射(无预处理)转换为斯托克斯预处理程序(通过拉普拉斯进行预处理),并基于一阶欧拉时间离散化方案构建。该预处理程序在两种流体配置上进行了测试:三维双扩散对流和剪切流的简化模型。在前者情况下,斯托克斯预处理有效,但混合预处理更受青睐。在后者情况下,方程组被拆分并同时求解,使用两种不同的预处理程序,其中一种参数依赖。由于这些应用的性质,该预处理程序有望帮助广泛的研究。

英文摘要:

This paper describes an adaptive preconditioner for numerical continuation of incompressible Navier--Stokes flows. The preconditioner maps the identity (no preconditioner) to the Stokes preconditioner (preconditioning by Laplacian) through a continuous parameter and is built on a first order Euler time-discretization scheme. The preconditioner is tested onto two fluid configurations: three-dimensional doubly diffusive convection and a reduced model of shear flows. In the former case, Stokes preconditioning works but a mixed preconditioner is preferred. In the latter case, the system of equation is split and solved simultaneously using two different preconditioners, one of which is parameter dependent. Due to the nature of these applications, this preconditioner is expected to help a wide range of studies.

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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