MEDIT
A File Format for Finite Element Meshes

MEDIT is a data directory which contains examples of files which can be used by the MEDIT program to define a 2D or 3D mesh for use by the finite element method (FEM), using triangles, quadrilaterals, tetrahedrons or hexahedrons.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

MEDIT, examples which illustrate the use of medit, an interactive graphics program developed to visualize numerical simulation results on unstructured meshes in two and three dimensions. Scalar, vector and tensor fields can be easily associated and displayed with meshes. The program is by Pascal Frey.

MEDIT_IO, a C library which can read or write files used by the MEDIT program, which can be used to define the a mesh associated with the finite element method (FEM) in 2D or 3D, using triangles, quadrilaterals, tetrahedrons or hexahedrons.

Reference:

1. Pascal Frey,
   MEDIT: An interactive mesh visualization software,
   Technical Report RT-0253,
   Institut National de Recherche en Informatique et en Automatique,
   03 December 2001.

Sample Files:

CUBE86 subdivides the unit cube, using 39 vertices to form 86 tetrahedra. There are 72 boundary triangles.

• cube86.mesh, the mesh file.
• cube86.png, a PNG snapshot.

CYL248 is a cylinder defined by 92 vertices. The volume is subdivided into 248 tetrahedra which have 154 boundary triangles.

• cyl248.mesh, the mesh file.
• cyl248.png, a PNG snapshot.

ELL is a 2D L-shaped region, with a grid of 65 nodes and 96 elements of order 3 triangles.

• ell.mesh, the mesh file.
• ell.png, a PNG snapshot.

GREENLAND is a triangulation of Greenland, using 66,425 nodes and 131,189 elements of order 3 triangles.

• greenland.mesh, the mesh file.
• greenland.bb, the ice thickness at each node.
• greenland_thickness.png, a color contour image of the ice thickness.

GREENLAND_OLD is a triangulation of Greenland, using 33,343 nodes and 64,125 elements of order 3 triangles.

• greenland_old.mesh, the mesh file.
• greenland_old.png, an image of a portion of the triangulation, after "zooming in" twice.

HEXAHEXA_2x2x2 subdivides the unit 3D cube into a 2x2x2 mesh of 8 subcubes or "hexahedra", using 27 vertices, and 24 boundary quadrilaterals.

• hexahexa_2x2x2.mesh, the mesh file.
• hexahexa_2x2x2.png, a PNG snapshot.

P01 is 3D data for a rectangular channel of dimensions 3x1x1 physical units, using 584 nodes and 2568 tetrahedral elements.

• p01.mesh, the mesh file.
• p01.png, an image of the mesh.

PART is a large 3D object including 28,694 vertices, 14,890 triangles, 150,779 tetrahedrons, 50 corners, 1905 edges and 1905 ridges.

• part.mesh, the mesh file.
• part.png, a PNG snapshot.

You can go up one level to the DATA directory.