Coarsening through directed droplet coalescence in fluid-fluid phase separation.
Phys Rev E Stat Nonlin Soft Matter Phys
; 80(1 Pt 1): 011708, 2009 Jul.
Article
em En
| MEDLINE
| ID: mdl-19658719
ABSTRACT
Phase-separation dynamics of an asymmetric mixture of an isotropic dopant in a nematogenic fluid is presented. We show that, on steady cooling, the nucleating nematic drops move down the dopant concentration gradient, with a velocity that is dependent on the cooling rate and concentration gradient. This propulsion of the drops leads to a mechanism of droplet coarsening, where radius of a drop scales with time as R(t) approximately t. Various mechanisms for droplet propulsion are discussed.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article