Homogenization and corrector results for the stochastic non-homogeneous incompressible Navier-Stokes equations with rapid oscillation

TL;DR

This paper studies the homogenization of stochastic non-homogeneous incompressible Navier-Stokes equations with rapid oscillations, establishing convergence to a homogenized system and a strong corrector result using advanced stochastic analysis techniques.

Contribution

It introduces new regularity estimates and stochastic lower semicontinuity methods to prove homogenization and corrector results for complex stochastic fluid equations.

Findings

Solutions converge to a homogenized stochastic system

A strong corrector result is established in H^1 space

Energy equations for the homogenized system are derived

Abstract

In this paper we are concerned with the homogenization property of stochastic non-homogeneous incompressible Navier-Stokes equations with rapid oscillation in a smooth bounded domain of $\mathbb{R}^d$, $d=2,3$, and driven by multiplicative infinite-dimensional Wiener noise. Using two-scale convergence, stochastic compactness and the martingale representation theory, we first show the solutions of original equations converge to the solution of a stochastic non-homogeneous incompressible homogenized system. Also, the energy equation of the homogenized system is established. Furthermore, a corrector result is proved which strengthens the two-scale convergence from weak to strong in the regularity space $H^1(\mathcal{O})$. Since the continuity equation which is of transport type cannot confer any regularization effect, there are some issues for proving the two results, including the difficulties for establishing the stochastic compactness and passing to the limit. We develop new regularity estimates, a stochastic version of lower semicontinuity as well as energy equation to overcome these difficulties.