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Related Experiment Video

Updated: Jan 13, 2026

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Published on: December 13, 2016

A phase-field model: Contact angle hysteresis driven by multistable surface composition.

Hongmin Zhang¹, Shan Lyu², Martin Reder³

¹Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Pl. 1, 76344, Eggenstein-Leopoldshafen, Germany.

Journal of Colloid and Interface Science

|January 8, 2026

Summary

This summary is machine-generated.

This study introduces a new model for fluid-solid interactions, explaining contact angle hysteresis and stick-slip behavior using molecular-scale surface energy. It highlights the role of surface composition and diffusion in fluid dynamics.

Keywords:

Adsorption and depletion layers Contact angle hysteresis Droplet friction Multistable surface compositions

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Last Updated: Jan 13, 2026

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Published on: December 13, 2016

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Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions

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Published on: April 19, 2018

Area of Science:

Physics
Materials Science
Chemical Engineering

Background:

Experimental data show density depletion at fluid-solid interfaces near hydrophobic substrates.
This suggests a heterogeneous and diffuse fluid-solid boundary.
Surface composition at the fluid-solid boundary may exist in multiple stable states.

Purpose of the Study:

To develop a model that accounts for multistable surface compositions.
To simulate static and dynamic contact angle hysteresis (CAH) on smooth substrates.
To investigate the origins of CAH and stick-slip behavior at the molecular level.

Main Methods:

Introduced a nonmonotonic wall free energy formulation.
Integrated this into a thermodynamically consistent phase-field model.
Allowed wall free energy relaxation for contact line motion via molecular diffusion.

Main Results:

Successfully reproduced multistable surface compositions and static CAH.
Captured dynamic CAH during droplet motion, including contact line pinning and advancing/receding states.
Observed emergent stick-slip behavior during droplet sliding with CAH.

Conclusions:

CAH and stick-slip behavior can arise solely from molecular-scale fluid-solid interactions.
Surface composition and interfacial diffusion are crucial factors, often missed in classical models.
The framework bridges thermodynamic and hydrodynamic views, offering insights into slip and friction at interfaces, relevant for microfluidics.