Abstract:
The infinite chain of Friedman–Keller equations is studied that describes the evolution of the entire set of moments of a statistical solution of an abstract analogue of the Navier–Stokes system. The problem of closure of this chain is investigated. This problem consists in constructing a sequence of problems $\mathfrak{A}_N=0$ of $N$ unknown functions whose solutions $M^N=(M_1^N,\dots,M_N^N,0,0,\dots)$ approximate the system of moments $M=(M_1,\dots,M_k,\dots)$ as $N\to+\infty$. The case of large Reynolds numbers is considered. Exponential rate of convergence of $~M^N$ to $M$ as $N\to\infty$ is proved.