pinch-off singularity

Wednesday, March 28, 2018 - 10:50am - 11:20am
Amir Pahlavan (Massachusetts Institute of Technology)
In their seminal works, Taylor and Bretherton showed that when a wetting viscous liquid is displaced by a less viscous non-wetting fluid in a capillary tube, a film of the defending liquid is left on the walls. Here, we revisit this classic problem in the partial wetting regime using both experiments and theory, and show that the flow dynamics drastically changes from the classic picture.
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