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SUMMARY:Bridging the scales near the contact line 1 - Pismen\, L (Technion
  - Israel Institute of Technology)
DTSTART:20130723T083000Z
DTEND:20130723T091500Z
UID:TALK46341@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Interface is where the macroscopic meets the microscopic\; eve
 n a simple fluid becomes there a complex fluid. The origins of surface ten
 sion and disjoining pressure lie in nanoscale density gradients governed b
 y molecular interactions. We shall see how the paradox of the moving conta
 ct line is resolved on the molecular scale when it is viewed as a physico-
 chemical problem dependent on fluidsubstrate interactions. \n\nThere is en
 ormous scale separation between molecular and hydrodynamic scales\, which 
 makes computation difficult but facilitates analytical theory. We ascend f
 rom molecular to macroscopic scales - from density functional theory to lu
 brication equations - by the approximation ladder. Multiscale perturbation
  theory elucidates dynamics of the contact line and provides tools for the
  study of various instabilities\, as demonstrated taking as an example the
  motion of droplets driven by surface forces. \n\n
LOCATION:Seminar Room 1\, Newton Institute
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