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SUMMARY:Virtual MEchanics GAthering -MEGA- Seminar: Fibre-induced reinforc
 ement of liquid cylinders undergoing an extensional flow
DTSTART:20200512T160000
DTEND:20200512T173000
DTSTAMP:20261002T014540Z
UID:ae0b5a74a6161aaa6e780f520622e38a1368612895a3322341b39acf
CATEGORIES:Conferences - Seminars
DESCRIPTION:Ludovic Keiser\, LFMI\, EPFL\nAbstract We study the drainage 
 dynamics of highly viscous liquid cylinders hanging from their upper base.
  When the liquid does not contain any solid fiber\, the drainage flow is m
 ostly resisted by extensional viscous dissipation and exhibits a pinch-off
  at a finite time. Focusing on dimensions larger than the capillary length
 \, surface tension is completely negligible\, and the dynamics is captured
  by balancing gravity and viscosity. Conversely\, a liquid cylinder contai
 ning an inner long fiber along its axis exhibits a much slower dynamics\, 
 as the viscous dissipation becomes dominated by shear dissipation. In orde
 r to connect these two different regimes\, suspensions containing a finite
  amount of rigid fibers are used. The pinch-off time can be controlled by
  tuning the initial disposition of these fibers. Experimental and numerica
 l results will be presented\, supported by analytical models.\n\nBio Ludo
 vic Keiser did his Ph.D. at ESPCI Paris under the supervision of Etienne R
 eyssat and José Bico\, working on interfacial instabilities and confined 
 droplets dynamics. In 2018\, he joined the Laboratory of Fluid Mechanics a
 nd Instabilities (LFMI) as a postdoctoral researcher\, supervised by Fran
 çois Gallaire.
LOCATION:Zoom epfl.zoom.us/s/93884794960 https://epfl.zoom.us/s/9388479496
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STATUS:CONFIRMED
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