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Practical Insights to Thin Film Dewetting.
Karim Gadelrab1, Stefan Reimann-Zitz2
1Research and Technology Center, Robert Bosch LLC, Watertown, Massachusetts 02472, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 24, 2026
Summary
This study quantifies how liquid film thickness and surface energy impact dewetting dynamics using lattice Boltzmann method simulations. Results show film thickness strongly influences dewetting time and final coverage, guiding material design.
Area of Science:
- Fluid dynamics
- Materials science
- Computational physics
Background:
- Thin liquid films are crucial in coatings, yet their instability and rupture dynamics are complex.
- Understanding dewetting kinetics is vital for controlling coating performance and material morphology.
Purpose of the Study:
- To systematically quantify the influence of film thickness, surface energy, wettability, and intermolecular forces on dewetting kinetics and morphology.
- To identify master-curve scalings for dewetting time and understand post-rupture film evolution.
Main Methods:
- Utilized the lattice Boltzmann method (LBM) simulations.
- Employed a lubrication-theory framework for computational efficiency.
- Analyzed parameters including film thickness, surface energy, contact angle, and intermolecular forces.
Main Results:
- Identified master-curve scalings for dewetting time, showing strong power-law dependence on film thickness.
- Observed a coverage plateau post-rupture, correlating with material parameters for morphological stabilization.
- Demonstrated that surface energy controls domain density during long-time coarsening.
Conclusions:
- Lubrication-based models provide predictive guidance for coating robustness and material design.
- The study offers insights into surface engineering strategies for thin liquid films.
- LBM simulations effectively capture complex dewetting phenomena.
