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SUMMARY:The rapid advance and slow retreat of a mushy zone - Tim  Schulze 
 (University of Tennessee)
DTSTART:20160609T130000Z
DTEND:20160609T134500Z
UID:TALK66408@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:<span> <span>Co-author: Nick Gewecke (Dalton State College) <b
 r></span></span><span><br>We discuss a model for the evolution of a mushy 
 zone which forms during the  solidification of a binary alloy cooled from 
 below in a finite domain. Our focus  is on behavior of the system that doe
 s not appear when either a semi-infinite  domain or negligible solute diff
 usion are assumed. The problem is simplified  through an assumption of neg
 ligible latent heat\, and we present a numerical  scheme that will permit 
 insights that are critical for developing a more general  procedure. We de
 monstrate that a mushy zone will initially grow rapidly\, then  slows down
  and eventually retreats slowly. The mushy zone vanishes after a long  tim
 e\, due to being overtaken by a slowly-growing solid region at the base of
  the  tank. Further results for mushy zones growing from boundaries cooled
  well below  the eutectic temperature and for systems with partial solute 
 rejection will also  be discussed.</span>
LOCATION:Seminar Room 1\, Newton Institute
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