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Transition from Exponentially Damped to Finite-Time Arrest Liquid Oscillations Induced by Contact Line Hysteresis
Benjamin Dollet1, Élise Lorenceau1, François Gallaire2
1Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France.
Physical Review Letters
|March 29, 2020
Summary
Wetting properties, specifically contact angle hysteresis, strongly damp liquid oscillations in U-shaped tubes. This solidlike friction causes oscillations to stop in finite time, depending on the initial amplitude.
Area of Science:
- Fluid dynamics
- Surface science
- Wettability phenomena
Background:
- Liquid oscillations in confined geometries are influenced by surface properties.
- Understanding damping mechanisms is crucial for predicting fluid behavior.
Purpose of the Study:
- To investigate the impact of wetting properties on the damping of liquid oscillations.
- To elucidate the role of sliding triple lines and contact angle hysteresis.
Main Methods:
- Studied liquid column oscillations in a U-shaped tube.
- Controlled surface conditions and observed triple line movement.
- Analyzed oscillation decay and dependence on initial amplitude.
Main Results:
- Strong, nonlinear damping of oscillations observed with sliding triple lines.
- Oscillations exhibited finite-time arrest.
- Damping showed a clear dependence on the initial amplitude.
Conclusions:
- Contact angle hysteresis is identified as the primary cause of the observed solidlike friction.
- Wetting properties significantly dictate the damping dynamics of liquid oscillations.
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