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Phase separation in a simple model with dynamical asymmetry

Ahluwalia, Rajeev (1999) Phase separation in a simple model with dynamical asymmetry. In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 59 (1). pp. 263-268.

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Official URL: http://pre.aps.org/abstract/PRE/v59/i1/p263_1

Abstract

We perform computer simulations of a Cahn-Hilliard model of phase separation that has dynamical asymmetry between the two coexisting phases. The dynamical asymmetry is incorporated by considering a mobility function that is order parameter dependent. Simulations of this model reveal morphological features similar to those observed in viscoelastic phase separation. In the early stages, the minority phase domains form a percolating structure that shrinks with time, eventually leading to the formation of disconnected regions that are characterized by the presence of random interfaces as well as isolated droplets. The domains grow as L(t)similar to t(1/3) in the very late stages. Although dynamical scaling is violated in the area shrinking regime, it is restored at late times. However, the form of the scaling function is found to depend on the extent of dynamical asymmetry. [S1063-651X(99)12101-9].

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 28 Jun 2011 10:10
Last Modified: 28 Jun 2011 10:10
URI: http://eprints.iisc.ernet.in/id/eprint/38714

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