Capillary dynamics in frictional fluids
| When |
Nov 21, 2023
from 11:00 to 12:00 |
|---|---|
| Where | Salle des thèses |
| Attendees |
Guillaume Dumazer |
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When granular matter is immersed in a two-fluid phases system, the complete mechanical coupling between fluid and granular phases is controlled by viscous dissipation and solid friction. Capillary forces at the interface between the two fluid phases also play an important role in such systems. The combination of these physical ingredients can be found in a large variety of industrial processes handling granular matter as well as in several geological natural processes.
I will present some research works attempting to provide clarified descriptions of capillary dynamics in frictional fluids, leading to surprising pattern formations and counter-intuitive dynamics. In particular, the dynamics of a frictional interface in a millifluidic tube will be presented. I will focus on the transition between interface displacement regimes selecting either solid friction or viscous dissipation.