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Interaction of Multiple Particles with a Solidification Front: From Compacted Particle Layer to Particle Trapping
Brice Saint-Michel1, Marc Georgelin1, Sylvain Deville2
1Aix Marseille Univ, CNRS, Centrale Marseille, IRPHE , Marseille, France.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 16, 2017
Summary
This study investigates how multiple particles interact with solidification fronts. We found that particle layers form, increasing repelling forces and influencing solidification patterns in various natural and technological processes.
Area of Science:
- Materials Science
- Physics
- Fluid Dynamics
Background:
- Solidification fronts interact with objects like particles, cells, and bubbles, determining outcomes like trapping or rejection.
- Most research focuses on single-object interactions, neglecting the common scenario of multiple objects affecting solidification patterns.
Purpose of the Study:
- To experimentally investigate the interaction of multiple particles with a solidification front.
- To extend single-particle models to account for multi-particle interactions and their effect on solidification.
Main Methods:
- Solidification experiments using a monodisperse particle suspension in a Hele-Shaw cell.
- Precise control of growth conditions and real-time visualization.
- Development of a force balance model incorporating viscous friction in particle layers.
Main Results:
- Observed formation of a particle layer ahead of the solidification front at close-packing volume fraction.
- Documented steady-state values of this layer at various solidification velocities.
- Showed that multiple particles increase repelling thermomolecular pressure by reducing the liquid film thickness.
Conclusions:
- The interaction of multiple particles with solidification fronts leads to distinct phenomena not seen with single particles.
- Findings provide a basis for understanding complex solidification in geophysics, engineering, biology, and food science.
- The developed model offers insights into the forces governing particle behavior at solidification fronts.
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