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Article Dans Une Revue Stochastics and Dynamics Année : 2022

Strong rates of convergence of space-time discretization schemes for the 2D Navier-Stokes equations with additive noise

Résumé

We consider the strong solution of the 2D Navier-Stokes equations in a torus subject to an additive noise. We implement a fully implicit time numerical scheme and a finite element method in space. We prove that the rate of convergence of the schemes is $\eta\in[0,1/2)$ in time and 1 in space. Let us mention that the coefficient $\eta$ is equal to the time regularity of the solution with values in $\LL^2$. Our method relies on the existence of finite exponential moments for both the solution and its time approximation. Our main idea is to use a discrete Gronwall lemma for the error estimate without any localization.
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hal-03133228 , version 1 (18-11-2022)

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Hakima Bessaih, Annie Millet. Strong rates of convergence of space-time discretization schemes for the 2D Navier-Stokes equations with additive noise. Stochastics and Dynamics, 2022, Special Issue on Modern Topics on Stochastic Dynamics, to celebrate Bjorn Schmalfuss' birthday, 22 (2), pp.2240005. ⟨hal-03133228⟩
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