Turbulence and coarsening in active and passive binary mixtures
Chaotic Dynamics
2009-11-11 v3 Statistical Mechanics
Abstract
Phase separation between two fluids in two-dimensions is investigated by means of Direct Numerical Simulations of coupled Navier-Stokes and Cahn-Hilliard equations. We study the phase ordering process in the presence of an external stirring acting on the velocity field. For both active and passive mixtures we find that, for a sufficiently strong stirring, coarsening is arrested in a stationary dynamical state characterized by a continuous rupture and formation of finite domains. Coarsening arrest is shown to be independent of the chaotic or regular nature of the flow.
Keywords
Cite
@article{arxiv.nlin/0507003,
title = {Turbulence and coarsening in active and passive binary mixtures},
author = {S. Berti and G. Boffetta and M. Cencini and A. Vulpiani},
journal= {arXiv preprint arXiv:nlin/0507003},
year = {2009}
}
Comments
4 pages, 5 figures; discussion on the dependence of the arrest scale on the shear rate has been added; figures have been modified accordingly