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 C(k, t) ~ L ? f[(k - kM)L], 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.
Scaling and hydrodynamic effects in lamellar ordering
A Lamura;
2005
Abstract
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 C(k, t) ~ L ? f[(k - kM)L], 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.File in questo prodotto:
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