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Three-phase contact line profile between a large air bubble and a flat solid surface.

M Mukherjee¹, A K Lahiri

¹Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, India. manas@met.iisc.ernet.in

Journal of Colloid and Interface Science

|July 16, 2005

Summary

The study observed how the three-phase contact line spreads after thin film rupture between an air bubble and a solid surface. Results show the contact line is noncircular for deformed bubbles.

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Area of Science:

Fluid dynamics
Surface science
Wettability studies

Background:

Understanding thin film rupture dynamics is crucial for processes involving fluid-solid interfaces.
The behavior of the three-phase contact (TPC) line influences phenomena like droplet spreading and dewetting.

Purpose of the Study:

To experimentally investigate the spreading dynamics of the TPC line following thin film rupture.
To analyze the geometric profile of the TPC line in the context of air bubble deformation.

Main Methods:

Utilized a CCD high-speed video technique for precise observation.
Focused on the rupture of the thin liquid film between a large air bubble and a flat solid surface.

Main Results:

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The TPC line profile was found to be noncircular when the bubble was deformed.

Observed the dynamic spreading of the TPC line post-rupture.

Conclusions:

Bubble deformation significantly impacts the TPC line geometry.
The study provides insights into the complex fluid dynamics at the three-phase contact during film rupture.