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Updated: Jun 25, 2026

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

Drops on an arbitrarily wetting substrate: a phase field description.

Rodica Borcia¹, Ion Dan Borcia, Michael Bestehorn

¹Lehrstuhl Statistische Physik, Nichtlineare Dynamik Brandenburgische Technische Universität, Cottbus, Germany. borcia@physik.tu-cottbus.de

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 5, 2009

Summary

This summary is machine-generated.

This study introduces a phase field model to simulate thin liquid films on solid surfaces. The model successfully predicts film breakup on hydrophobic surfaces and drop behavior on inclined substrates.

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Last Updated: Jun 25, 2026

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Published on: June 14, 2019

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Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films

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Published on: August 18, 2018

Area of Science:

Fluid dynamics
Materials science
Computational physics

Background:

Understanding thin liquid films is crucial in various scientific and industrial applications.
Existing models often rely on complex interface conditions, limiting their applicability.
The van der Waals fluid model provides a suitable framework for phase field studies far from critical points.

Purpose of the Study:

To develop and validate a phase field model for studying thin liquid films on solid substrates.
To investigate the influence of surface wettability on liquid film stability.
To simulate the behavior of liquid drops on static and dynamic substrates.

Main Methods:

Utilizing a phase field model based on the Navier-Stokes and continuity equations.
Incorporating extra phase field terms derived from fluid density.
Controlling the contact angle via boundary conditions for the density field.
Performing two-dimensional numerical simulations.

Main Results:

The model accurately simulates thin liquid films without explicit interface conditions.
Variable wettability was investigated, showing film breakup on hydrophobic surfaces.
Simulations demonstrated static drop configurations and gravity-driven sliding of drops on inclined surfaces.

Conclusions:

The proposed phase field model offers a robust method for studying thin liquid films and their interactions with solid substrates.
The model successfully captures phenomena like film dewetting and drop dynamics.
This approach provides a valuable tool for predicting liquid behavior in systems with controlled wettability.