Phase Separation
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Index   Experiments   Theory   Simulation   Drops   Conclusions
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Motion of One Isolated Drop

One Drop - Positive Phi
movie (1.3M mpeg)

The motion of liquid droplets in phase separating mixtures depends on the difference between the concentration of the continuum phase and its equilibrium value, del phi, as well as on convection. Isolated drops immersed in homogeneous concentration fields grow linearly in size and move randomly, when del phi > 0; otherwise, drops shrink and do not move.

One Drop - Negative Phi
movie (1.4M mpeg)

rule

Motion of Two Isolated Drops

Two Drops - Positive Phi
movie (0.7M mpeg) movie (0.8M mpeg)

The capillary forces induce mutual attraction between two drops. If del phi < 0, the attractive force leads always to coalescence, while when del phi > 0, screening effect may keep the drops apart from each other.

Two Drops - Negative Phi
movie (1.0M mpeg)

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Index   Experiments   Theory   Simulation   Drops   Conclusions
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By: Roberto Mauri, Andrea Malagoli, Natalia Vladimirova,
Last modified: 10 January 1999