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Coarsening dynamics of phase-separating systems.

A J Bray1

  • 1Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|July 23, 2003
PubMed
Summary

Binary liquids rapidly cooled form domains that coarsen over time. External drives like shear flow influence this domain growth, raising questions about long-term behavior and arrest.

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Area of Science:

  • Physics
  • Materials Science
  • Physical Chemistry

Background:

  • Rapid cooling of binary liquids from a homogeneous phase leads to the formation and growth (coarsening) of domains of two equilibrium phases.
  • In the absence of external drives, systems often exhibit dynamical-scaling, where domain morphology is statistically self-similar over time, characterized by a growing length-scale.

Purpose of the Study:

  • To review the scaling phenomenology of domain coarsening in binary liquid systems.
  • To discuss the time-dependence of the coarsening scale across various physical systems and scaling regimes.
  • To address the influence of external drives, specifically shear flow, on domain coarsening dynamics.

Main Methods:

  • Review of existing literature on dynamical-scaling and coarsening phenomena.
  • Analysis of theoretical frameworks describing domain growth under different conditions.
  • Discussion of experimental observations and recent developments in the field.

Main Results:

  • Under no external drive, domain coarsening follows a dynamical-scaling regime with a statistically self-similar morphology.
  • The coarsening scale grows with time, a behavior observed in various physical systems.
  • External drives, particularly shear flow, can significantly alter the coarsening process, with ongoing research into their precise effects.

Conclusions:

  • Domain coarsening in binary liquids is a fundamental process governed by scaling laws in the absence of external forces.
  • Shear flow introduces complexities, potentially altering the late-time coarsening behavior.
  • Further investigation is needed to understand if shear flow ultimately arrests or indefinitely continues the coarsening process.

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