An infinity of possible invariants for decaying homogeneous turbulence
Fluid Dynamics
2011-01-05 v1 Mathematical Physics
math.MP
Abstract
The von Karman-Howarth equation implies an infinity of invariants corresponding to an infinity of different asymptotic behaviours of the double and triple velocity correlation functions at infinite separations. Given an asymptotic behaviour at infinity for which the Birkhoff-Saffman invariant is not infinite, there are either none, or only one or only two finite invariants. If there are two, one of them is the Loitsyansky invariant and the decay of large eddies cannot be self-similar. We examine the consequences of this infinity of invariants on a particular family of exact solutions of the von Karman-Howarth equation.
Keywords
Cite
@article{arxiv.1101.0704,
title = {An infinity of possible invariants for decaying homogeneous turbulence},
author = {Christos Vassilicos},
journal= {arXiv preprint arXiv:1101.0704},
year = {2011}
}
Comments
9 pages, submitted to Phys Lett A, revised version