Related Experiment Videos
Dewetting hydrodynamics in 1+1 dimensions
H Müller-Krumbhaar1, H Emmerich, E Brener
1Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany.
Summary
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.
- 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.