$\mathbb{H}^1$-Random attractors for 2D stochastic convective Brinkman-Forchheimer equations in unbounded domains

TL;DR

This paper establishes the existence of $ ext{H}^1$-random attractors and invariant measures for 2D stochastic convective Brinkman-Forchheimer equations in unbounded domains, analyzing their asymptotic behavior under additive noise.

Contribution

It proves the existence of $ ext{H}^1$-random attractors and invariant measures for these equations in unbounded domains, extending previous results to more general settings.

Findings

Existence of $ ext{H}^1$-random attractors in Poincaré domains.

Existence of a unique invariant measure in $ ext{H}^1$.

Upper semicontinuity of attractors when domain changes from bounded to unbounded.

Abstract

The asymptotic behavior of solutions of two dimensional stochastic convective Brinkman-Forchheimer (2D SCBF) equations in unbounded domains is discussed in this work (for example, Poincar\'e domains). We first prove the existence of $\mathbb{H}^1$-random attractors for the stochastic flow generated by 2D SCBF equations (for the absorption exponent $r\in[1,3]$) perturbed by an additive noise on Poincar\'e domains. Furthermore, we deduce the existence of a unique invariant measure in $\mathbb{H}^1$ for the 2D SCBF equations defined on Poincar\'e domains. In addition, a remark on the extension of these results to general unbounded domains is also discussed. Finally, for 2D SCBF equations forced by additive one-dimensional Wiener noise, we prove the upper semicontinuity of the random attractors, when the domain changes from bounded to unbounded (Poincar\'e).