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SUMMARY:Virtual MEchanics GAthering -MEGA- Seminar: Elastic amplification 
 of the Rayleigh–Taylor instability in solidifying melts
DTSTART:20210520T161500
DTEND:20210520T173000
DTSTAMP:20260414T211959Z
UID:5ee90ba47d78ce5bd240bb9784d29901b999fb28ea69fd7c6364a27c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Etienne Jambon-Puillet (LElab\, Princeton University)\nAbstrac
 t The concomitant deformation and solidification of melts are relevant to
  a broad range of phenomena. Examples include glass blowing\, the preparat
 ion of cotton candy\, or the atomization of metals. Usually\, solid-like d
 eformations during solidification are neglected as the melt is much more m
 alleable in its initial liquid-like form. Here we demonstrate how elastic 
 deformations in the midst of solidification\, i.e.\, while the melt respon
 ds as a very soft solid (G~100 Pa)\, can lead to the formation of previous
 ly unknown periodic structures. Namely\, we generate an array of droplets 
 on a thin layer of liquid elastomer using the Rayleigh–Taylor instabilit
 y. Then\, as the melt cures\, we stretch the drops into hairs which eventu
 ally hardens\, permanently “freezing” these elastic deformations into 
 a patterned solid. Using experiments\, simulation\, and theory\, we demons
 trate that the formation of our two-step patterns can be rationalized when
  combining the tools from fluid mechanics\, elasticity\, and statistics.\n
 \nBio Etienne Jambon-Puillet is a postdoc in P.T. Brun's liquid & elastic
 ity laboratory in Princeton University where he studies the mechanics of f
 luid interfaces and slender structures. Prior to that\, Etienne got his Ph
 D from Sorbonne Université working on the mechanical properties of dense 
 assemblies of floating particles under the supervision of Suzie Protière 
 and then on wetting and evaporation during his first postodc at the Univer
 sity of Amsterdam with Daniel Bonn.\n 
LOCATION:https://epfl.zoom.us/s/84678428267 Passcode: 174387 https://epfl.
 zoom.us/s/84678428267
STATUS:CONFIRMED
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