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SUMMARY:Second-order conservative remapping between unstructured spherical
  meshes - Evaggelos Kritsikis\,   (Laboratoire des Sciences du Climat et l
 'Environnement (LSCE))
DTSTART:20120925T160000Z
DTEND:20120925T162500Z
UID:TALK40083@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Remapping from one finite-dimensional description of a functio
 n to another is a common problem in numerical modelling. In particular\, i
 nformation transit between meshes is required for\, e.g.\, model coupling 
 or mesh adaptation. In order to preserve the properties of a numerical sch
 eme such as conservativity\, accuracy\, positivity\, etc.\, the remapping 
 algorithm must itself possess these properties. A second-order\, conservat
 ive remapping between unstructured spherical meshes is presented. Areas ar
 e computed exactly by the defect formula and gradients estimated by the Ga
 uss formula. Data is tree-structured\, so that neighbour search is done in
  logarithmic time. In addition\, the algorithm lends itself well to parall
 elisation. Numerical tests on various unstructured grids are given. \n
LOCATION:Seminar Room 1\, Newton Institute
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