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Turbulence and Coarsening in Active and Passive Binary Mixtures

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2005
auteur(s) Berti Stefano; Boffetta Guido; Cencini Massimo; Vulpiani Angelo
journal (abréviation) Physical Review Letters (Phys Rev Lett)
volume (numéro) 95
numéro de papier 224501
résumé 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.
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