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Related Experiment Videos

Convection-driven pattern formation in phase-separating binary fluids.

C M Pooley1, Olga Kuksenok, Anna C Balazs

  • 1Department of Chemical Engineering, University of Pittsburgh, Pennsylvania 15261, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|May 21, 2005
PubMed
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Partially miscible fluids exhibit complex phase behavior under temperature gradients. Convection and phase separation create unique patterns, from stripes to chaotic dripping.

Area of Science:

  • Fluid dynamics
  • Thermodynamics
  • Computational physics

Background:

  • Partially miscible fluids display complex phase behavior near their critical temperature.
  • Temperature gradients can induce convection and influence fluid phase separation.

Purpose of the Study:

  • To investigate the phase behavior of partially miscible fluids under a vertical temperature gradient.
  • To explore the interplay between convection and phase separation in confined binary fluid mixtures.

Main Methods:

  • A thermal-lattice Boltzmann model was employed to simulate fluid dynamics.
  • The study confined a binary AB fluid between two plates with different temperature conditions.

Main Results:

  • Identified distinct pattern formation regimes: regularly spaced stripes, convective columns, disturbed columns, and chaotic dripping.

Related Experiment Videos

  • Observed a coupling between convection driven by the temperature gradient and phase separation.
  • Demonstrated unique dynamical behaviors in partially miscible mixtures.

    • Conclusions:

    • The study reveals rich phase behavior and pattern formation in partially miscible fluids under thermal gradients.
    • Convection significantly influences phase separation dynamics, leading to complex emergent structures.