Volume 71, Number 4, August 2005
|Page(s)||651 - 657|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||20 July 2005|
Scaling and hydrodynamic effects in lamellar ordering
Dipartimento di Fisica, Università di Bari and Center of Innovative Technologies for Signal Detection and Processing (TIRES) and INFN, Sezione di Bari and INFM via Amendola 173, 70126 Bari, Italy
2 Istituto Applicazioni Calcolo, CNR, Sezione di Bari via Amendola 122/D, 70126 Bari, Italy
3 CASPUR - via dei Tizii 6/b, 00185 Roma, Italy
Accepted: 23 June 2005
We study the kinetics of domain growth of fluid mixtures quenched from a disordered to a lamellar phase. At low viscosities, in two dimensions, when hydrodynamic modes become important, dynamical scaling is verified in the form , where C is the structure factor with maximum at kM and L is a typical length with logarithmic growth at late times. The presence of extended defects can explain the behavior of L. Three-dimensional simulations confirm that diffuse grain boundaries inhibit complete ordering of lamellae. Applied shear flow alleviates frustration and gives power law growth at all times.
PACS: 64.75.+g – Solubility, segregation, and mixing; phase separation / 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 47.20.Hw – Morphological instability; phase changes
© EDP Sciences, 2005
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