Mesh generation specifically designed for meteorological problems but usable with any type of geometry


  • 3D HEXA Mesh generator (for volumes with topography).
  • This is the first version. More options will be added with time.

  1. Download from: mmesh3d.wikispaces.com/


  • A simple grid generator for structured grids (HEXA and WEDGE) with topography on the lower surface.
  • It prints 2 output files: as follows
  • 3Dstructured_mesh.vtk for plotting with a VTK reader
  • 3Dstructured_mesh.msh with the structure shown below



world.jpgspain_HEXA_4kmres.jpg\south-easternUSAbottomView.jpg
south-easternUSA.jpg
ELEMENTS
 iel node1 node2 node3 node4 node5 node6 node7 node8
...
END_ELEMENTS
COORDINATES
 icoord Xi Yi Zi
END_COORDINATES




  • Structured mesh of QUADS and three different TRI configurations built around an arbitrary obstacle:

meshQUAD.jpeg
QUAD

meshTRI30000.jpeg
TRI type 1

meshTRI10000.jpeg
TRI type 2

meshTRI20001.jpeg
TRI type 3




  • Sample of mesh with Schar vertical distribution of the nodes.
  • Colored by the degree of distorsion in terms of maximum angle (Post processing done with VisIt):
mesh_agnesi_maxAngle-0.jpg



  • 3 Images showing the different vertical level distributions using a SIGMA-coordinate system, a
  • HYBRID with scaling factor s=8km, and a SCHAR with s1=15000m and s2=2500m

sigma.jpg
SIGMA

hybrid_s-8000m.jpg
Hybrid with s=8km

schar_s1-15km_s2-2500m.jpg
Schar s1=15km, s2=2.5km