@Article{CiCP-36-821, author = {Feng , Xiaobing and Vo , Liet}, title = {High Moment and Pathwise Error Estimates for Fully Discrete Mixed Finite Element Approximations of Stochastic Navier-Stokes Equations with Additive Noise}, journal = {Communications in Computational Physics}, year = {2024}, volume = {36}, number = {3}, pages = {821--849}, abstract = {

This paper is concerned with high moment and pathwise error estimates for fully discrete mixed finite element approximations of stochastic Navier-Stokes equations with general additive noise. The implicit Euler-Maruyama scheme and standard mixed finite element methods are employed respectively for the time and space discretizations. High moment error estimates for both velocity and time-averaged pressure approximations in strong $L^2$ and energy norms are obtained, pathwise error estimates are derived by using the Kolmogorov Theorem. Unlike their deterministic counterparts, the spatial error constants grow in the order of $\mathcal{O}(k^{-\frac{1}{2}} ),$ where $k$ denotes time step size. Numerical experiments are also provided to validate the error estimates and their sharpness.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2023-0234}, url = {http://global-sci.org/intro/article_detail/cicp/23459.html} }