A virtual element method for stochastic Stokes equations

A virtual element method for stochastic Stokes equations
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随机Stokes方程的虚元法

DOI:
10.1016/j.camwa.2019.10.005
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发表时间:
2020-03
影响因子:
2.9
通讯作者:
Huo Yuan Duan
Huo Yuan Duan
中科院分区:
数学2区
文献类型:
--
作者:
Wei Liu;Huo Yuan Duan

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本文提出并分析了加性白色噪声驱动下随机Stokes方程的虚元方法。速度用泊松方程的最低阶虚元逼近,投影也采用泊松方程的投影,压力用传统的间断分段常数元逼近。对于稳定的近似,我们采用与压力跳跃相关联的稳定化。我们证明了inf-sup条件,并得到了稳定性。利用绿色函数得到了各种范数下的误差估计和误差的期望估计。多边形网格上的数值结果表明,所提出的方法和理论结果的性能。
In this paper, a virtual element method for the stochastic Stokes equations driven by an additive white noise is proposed and analyzed. The velocity is approximated by the lowest-order virtual element which is originally designed for the Poisson equation and the projection is also taken as the one originally for the Poisson equation, while the pressure is approximated by the traditional discontinuous piecewise constant element. For stable approximations, we adopt a stabilization associating with the pressure jumps. We show the inf-sup condition and derive the stability. We moreover obtain the error estimates in various norms and the estimates of the expectation of the errors through the Green function. Numerical results on polygonal mesh are presented to illustrate the performance of the proposed method and the theoretical results obtained.
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