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SUMMARY:Jens Eggers (Bristol\, UK)
DTSTART:20231006T150000Z
DTEND:20231006T160000Z
DTSTAMP:20260423T022917Z
UID:GEOTOP-A/52
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GEOTOP-A/52/
 ">Geometrical singularities and free surface cusps</a>\nby Jens Eggers (Br
 istol\, UK) as part of GEOTOP-A seminar\n\n\nAbstract\nCusp shapes are wid
 ely observed in nature\, most famously as the bright caustic lines on the 
 inside of a coffee cup. This can be understood from the fact that a cusp a
 rises from the smooth deformation of a parameterized curve. Remarkably\, t
 he same generic cusp can be formed on the surface of a viscous fluid with 
 surface tension\, as demonstrated by Jeong and Moffatt [J. Fluid Mech. 241
 \, 1\, (1992)]\, using complex mapping techniques. However\, their observa
 tion is limited to very specific and idealized geometries. Here we demonst
 rate that cusps are indeed local solutions to the Stokes equation with sur
 face tension\, regardless of the global flow.\n
LOCATION:https://researchseminars.org/talk/GEOTOP-A/52/
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