Global-in-time probabilistically strong solutions to stochastic power-law equations: existence and non-uniqueness

Abstract

We are concerned with the power-law fluids driven by an additive stochastic forcing in dimension $d\ge 3$. For the power index $r\in (1,\frac{3d+2}{d+2})$, we establish existence of infinitely many global-in-time probabilistically strong and analytically weak solutions in $L_{loc}^p([0,\infty );L^2)\cap C([0,\infty );W^{1,\max \{1,r-1\}}),p\ge 1$ for every divergence free initial condition in $L^2\cap W^{1,\max \{1,r-1\}}$. This result in particular implies non-uniqueness in law. Our result is sharp in the three dimensional case in the sense that the solution is unique if $r\ge \frac{3d+2}{d+2}$.

arXiv admin note: text overlap with arXiv:2104.09889