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SUMMARY:Elastocapillary flows - Camille Duprat (ESPCI)
DTSTART:20130201T160000Z
DTEND:20130201T170000Z
UID:TALK42521@talks.cam.ac.uk
CONTACT:Dr Ed Brambley
DESCRIPTION:The deformation of elastic structures under capillary forces (
 elastocapillarity) and their interaction with fluid flow (elastohydrodynam
 ics)\, are important in many biological\, geophysical and engineering proc
 esses. In this talk\, I will present three model systems of elastocapillar
 y flows\, using a combination of experiment\, theory\, and numerical simul
 ation. First\, I will present two model systems of surface-tension-driven 
 flows into a gap between flexible boundaries (i.e. elastocapillary imbibit
 ion)\, with and without gravitational effects\,  to demonstrate how the pr
 esence of flexible boundaries leads to a departure from classical imbibiti
 on. A criterion for the coalescence of the boundaries (i.e. liquid capture
 ) is established. Then\, I will consider the elastocapillary response of a
 n array of elastic fibres interacting with a mist of droplets. For both th
 e wetting and deformation of the substrates\, universal rules are deduced 
 from the geometric and material properties of the fibres and the volume of
  the drops. Further\, I apply these results to the drying of flexible fibr
 e arrays.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberforce Road\, Cambr
 idge
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