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Turbulence and Coarsening in Active and Passive Binary Mixtures

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Physical Review Letters, 95 (22): 224501 (2005)
DOI: 10.1103/PhysRevLett.95.224501

Аннотация

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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