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CATEGORIES:DAMTP BioLunch
SUMMARY:Stability and dynamics of a single Plateau border 
 - Christophe Raufaste (Université Côte d'Azur\, Ni
 ce)
DTSTART;TZID=Europe/London:20180322T130000
DTEND;TZID=Europe/London:20180322T140000
UID:TALK101731AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/101731
DESCRIPTION:Assemblies of soap bubbles in close contact displa
 y geometrical patterns dictated by the principle o
 f energy minimization. Thus Joseph Plateau formula
 ted in the 19th century that soap films and Platea
 u borders\, which are the liquid channels found at
  the intersection between three films\, exhibit re
 gular angles.\nWhat is not formulated in Plateau’s
  laws is why such assemblies are (meta)stable. For
  instance\, it is at first surprising that Plateau
  borders are not subject to the Rayleigh Plateau i
 nstability unlike liquid filaments.\nDuring this f
 oam-lunch I will present experiments that probe th
 e stability of the Plateau borders using several t
 ypes of perturbations. We will make the link betwe
 en the stability and a negative effective surface 
 tension that drives the relaxation dynamics. For s
 ome regimes\, this relaxation is strong enough to 
 trigger fast and inertial flows characterized by s
 trongly nonlinear features such as hydraulic jumps
  and solitons.
LOCATION:MR11\, Centre for Mathematical Sciences\, Wilberfo
 rce Road\, Cambridge
CONTACT:Anne Herrmann
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