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Formation, stability and hydrothermal waves in evaporating liquid lenses
1Tianjin Key Lab of Refrigeration Technology, Tianjin University of Commerce, Tianjin City 300134, P. R. China. cosimobuffone@gmail.com.
Soft Matter
|February 13, 2019
Summary
Evaporative cooling drives the formation and complex dynamics of liquid lenses on liquid pools. This study reveals significant interactions and thermal patterns influencing lens stability.
Area of Science:
- Fluid dynamics
- Thermodynamics
- Surface science
Background:
- Liquid lenses are crucial in various scientific applications.
- Understanding their formation and stability on liquid pools is complex.
- Evaporative effects significantly influence liquid interfaces.
Purpose of the Study:
- To investigate the formation, stability, and thermal patterns of evaporating liquid lenses on liquid pools.
- To understand the interaction between the liquid lens and the underlying pool.
- To elucidate the role of evaporative cooling in lens formation and dynamics.
Main Methods:
- Experimental investigation using infra-red thermography.
- Measurement of key lens and pool surface parameters.
- Analysis of liquid lens deformation and stability.
Main Results:
- Significant interaction observed between the liquid lens and the pool.
- Contact line deformation attributed to buoyancy-thermocapillary convection cells.
- Evaporative cooling identified as the primary driver for lens formation at ambient temperature.
- Pool depth critically influences volatile lens stability and dynamics.
Conclusions:
- Evaporative cooling is essential for the formation of liquid lenses on liquid pools.
- Buoyancy-thermocapillary convection plays a key role in lens-pool interactions.
- Pool depth is a critical parameter for controlling liquid lens stability.
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