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mesh [Elmer/Ice Wiki]

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mesh [2017/07/18 09:39]
fgillet [Mesh Adaptation]
mesh [2020/05/02 12:55] (current)
fgillet [2D mesh from a closed contour]
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 |[[mesh:mshdem|MshGlacierDEM]]   | 3D      | 3D footprint x 1m   |DEMs         |bilinear | |[[mesh:mshdem|MshGlacierDEM]]   | 3D      | 3D footprint x 1m   |DEMs         |bilinear |
 |[[mesh:mshsynthetic|MshGlacierSynthetic]]   | 2D & 3D      | 2D or 3D footprint x 1m   |functions         |N/A | |[[mesh:mshsynthetic|MshGlacierSynthetic]]   | 2D & 3D      | 2D or 3D footprint x 1m   |functions         |N/A |
 +
  
 <sup>1)</sup> possibility to include boundary layer at top or bottom <sup>1)</sup> possibility to include boundary layer at top or bottom
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 Other usefull tools for mesh generation are [[mesh:gmsh|GMSH]], a three-dimensional finite element mesh generator and the fully automatic adaptive isotropic surface remeshing tool [[mesh:yams|YAMS ]]. Other usefull tools for mesh generation are [[mesh:gmsh|GMSH]], a three-dimensional finite element mesh generator and the fully automatic adaptive isotropic surface remeshing tool [[mesh:yams|YAMS ]].
 +==== 2D mesh from a closed contour ====
 +
 +Meshing tools to create the mesh of a 2D domain from a closed contour are available 
 + [[https://github.com/ElmerCSC/elmerfem/tree/elmerice/elmerice/Meshers/GIS|here]].
 +
 +The contour can be given as a shapefile. The elmer  mesh (elements and boundary elements) can be converted
 +to shapefiles to be visualised in a GIS software (e.g. QGIS).
 +
 ==== Structured Mesh Facilities ==== ==== Structured Mesh Facilities ====
  
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 Here, we use an error estimate based on the interpolation error, proposed by Frey and Alauzet (2005). Routines to compute the anisotropic metric defining the mesh size have been implemented as Elmer/Ice Solvers. The mesh adaptation is performed using the freely available library MMG ([[http://www.mmgtools.org]], Dapogny et al., 2014).   Here, we use an error estimate based on the interpolation error, proposed by Frey and Alauzet (2005). Routines to compute the anisotropic metric defining the mesh size have been implemented as Elmer/Ice Solvers. The mesh adaptation is performed using the freely available library MMG ([[http://www.mmgtools.org]], Dapogny et al., 2014).  
  
-Our implementation is actually restricted to the adaptation of plane-view 2D meshes comprised of linear 3-nodes triangular elements. This procedure was previously performed using external codes and the remeshing software Yams.  The mesh adaptation features are documented [[mesh:meshadaptation|here]]+Our implementation is actually restricted to the adaptation of plane-view 2D meshes comprised of linear 3-nodes triangular elements. This procedure was previously performed using external codes and the remeshing software Yams.  The mesh adaptation features are documented [[mesh:meshadaptation|here]].
mesh.1500370747.txt.gz ยท Last modified: 2017/07/18 09:39 by fgillet
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