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SUMMARY:Interface effects in two-phase phase physics - David  Bercovici (Y
 ale University)
DTSTART:20160217T090000Z
DTEND:20160217T100000Z
UID:TALK64714@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Most theories of two-phase compaction theory converge to the s
 ame set of governing equations&nbsp\;for geologically relevant limits. &nb
 sp\;However not many include the infuence of surface energyand thermodynam
 ics on the interface between phases. &nbsp\;The effect of interface surfac
 e energyhas multiple effects in two-phase flows including capillary forces
  and wetting\, self-separation\,&nbsp\;and is even at the heart of void-ge
 nerating damage theories. &nbsp\;Moreover\, surface energy effectsdrive co
 arsening in mixtures and grained media (e.g.\, Ostwald ripening or normal 
 grain-growth)\,&nbsp\;nucleation during phase changes\, and blocking or Ze
 ner pinning of migrating grain boundaries. &nbsp\;Surface thermodynamics i
 s\, again\, central to grain-damage theories\, and the combined influence 
 ofgrain-growth\, interface coarsening\, Zener pinning and damage in two ph
 ases allows a reasonable&nbsp\;model for lithospheric localization and pla
 te tectonic generation. Finally\, a new theory for&nbsp\;diffuse interface
  capillary effects might provide a means for band width selection in melt-
 shear&nbsp\;band instabilities.<br>
LOCATION:Seminar Room 1\, Newton Institute
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