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SUMMARY:Bridging the scales near the contact line 3 - Pismen\, L (Technion
  - Israel Institute of Technology)
DTSTART:20130726T130000Z
DTEND:20130726T134500Z
UID:TALK46394@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 eno
 rmous scale separation between molecular and hydrodynamic scales\, which m
 akes computation difficult but facilitates analytical theory. We ascend fr
 om molecular to macroscopic scales - from density functional theory to lub
 rication 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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