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SUMMARY:Multiscale ocean simulations with FESOM - Sergey Danilov\,   (Alfr
 ed-Wegener-Institut fr Polar- und Meeresforschung (AWI))
DTSTART:20120924T130000Z
DTEND:20120924T132500Z
UID:TALK40008@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Finite-Element Sea-ice Ocean circulation Model (FESOM) uses un
 structured triangular meshes and is employed either as standing-alone glob
 al ocean model or as part of FESOM-ECHAM5/6 coupled setup. Several example
 s pertaining to studies focused on polar oceans will be given to character
 ize the potential of FESOM and also to indicate typical difficulties relat
 ed to the strongly variable resolution. \n\nBrief intercomparison of FESOM
  to a global cell-vertex finite-volume setup is presented. While it is mor
 e numerically efficient than the finite-element setup of FESOM\, it requir
 es special measures to maintain stable performance because of its too larg
 e velocity space. Most effective stabilization is provided by either compu
 ting the momentum advection on scalar (median-dual) control volumes\, or m
 aking use of the vector-invariant form. Both approaches effectively trim t
 he nonlinear term in the momentum equation to the size of scalar space. \n
 \n
LOCATION:Seminar Room 1\, Newton Institute
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