Surface effects on spinodal decomposition in binary mixtures: the case with long-ranged surface fields

Puri, Sanjay ; Binder, Kurt ; Frisch, Harry L. (1997) Surface effects on spinodal decomposition in binary mixtures: the case with long-ranged surface fields Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 56 (6). pp. 6991-7000. ISSN 1539-3755

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Official URL: http://pre.aps.org/abstract/PRE/v56/i6/p6991_1

Related URL: http://dx.doi.org/10.1103/PhysRevE.56.6991

Abstract

We present detailed numerical results for phase-separation kinetics of critical binary mixtures in the vicinity of a surface that exerts a long-ranged attractive force on one of the components of the mixture. We consider surface potentials of the form V(Z)~Z-n, where Z is the distance from the surface and n=1,2,3. In particular, we investigate the interplay of the surface wetting layer with the dynamics of domain growth. We find that the wetting layer at the surface exhibits power-law growth with an exponent that depends on n, in contrast to the case with a short-ranged surface potential, where the growth is presumably logarithmic. From correlation functions, we identify characteristic length scales in directions parallel and perpendicular to the surface. We observe a regime of accelerated growth in the parallel direction and critically examine some possible explanations for this.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:33774
Deposited On:25 Apr 2011 06:31
Last Modified:25 Apr 2011 06:31

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