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Dewetting hydrodynamics in 1+1 dimensions.

H Müller-Krumbhaar1, H Emmerich, E Brener

  • 1Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|April 20, 2001
PubMed
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This study introduces a new model for fluid dewetting, incorporating hydrodynamic flow during phase transitions. The model effectively simulates fluid behavior on substrates, offering insights into wetting and dewetting dynamics.

Area of Science:

  • Fluid dynamics
  • Materials science
  • Surface science

Background:

  • Understanding phase transitions between wetting and dewetting is crucial for various applications.
  • Existing models often simplify or neglect the complex hydrodynamic flows during dewetting.

Purpose of the Study:

  • To develop a computational model that accurately captures the phase transition between partial wetting and dewetting.
  • To incorporate hydrodynamic flow explicitly within a 1+1 dimensional model of dewetting.
  • To simulate a fluid layer on a substrate coexisting with dry regions and a gas phase.

Main Methods:

  • Formulation of a new phase-field model variant for handling freely movable interfaces.
  • Simulation of a fluid layer of finite thickness on a substrate.

Related Experiment Videos

  • Incorporation of hydrodynamic flow during nonequilibrium dewetting conditions.

    • Main Results:

    • The model successfully simulates the movement of the dewetting front, inducing hydrodynamic flow.
    • The developed code is efficient and provides well-defined interfacial properties.
    • The model demonstrates efficacy across a range of viscosities, including creeping flow and qualitative results for higher Reynolds numbers.

    Conclusions:

    • The new phase-field model provides an effective tool for studying fluid dewetting dynamics.
    • The model's ability to incorporate hydrodynamic flow offers a more realistic simulation of phase transitions.
    • The research has potential connections to experimental realizations of wetting and dewetting phenomena.