Stochastic Galerkin methods for the steady-state Navier–Stokes equations
Stochastic Galerkin methods for the steady-state Navier–Stokes equations
复制标题
稳态纳维斯托克斯方程的随机伽辽金方法
DOI:
10.1016/j.jcp.2016.04.013
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发表时间:
2016
影响因子:
4.1
通讯作者:
Elman, Howard C.
中科院分区:
文献类型:
--
作者:
Sousedík, Bedřich;Elman, Howard C.
We study the steady-state Navier–Stokes equations in the context of stochastic finite element discretizations. Specifically, we assume that the viscosity is a random field given in the form of a generalized polynomial chaos expansion. For the resulting stochastic problem, we formulate the model and linearization schemes using Picard and Newton iterations in the framework of the stochastic Galerkin method, and we explore properties of the resulting stochastic solutions. We also propose a preconditioner for solving the linear systems of equations arising at each step of the stochastic (Galerkin) nonlinear iteration and demonstrate its effectiveness for solving a set of benchmark problems.