tethex

tethex, examples which illustrate the use of TETHEX, a C++ code which reads a Gmsh file defining a mesh of triangles or tetrahedrons, and subdivides the mesh into quadrilaterals or hexahedrons, which are suitable for use by the DEALII finite element program, by Mikhail Artemiev.

Licensing:

The information on this web page is distributed under the MIT license.

Related Data and Programs:

DEALII, examples which illustrate the use of DEAL.II, a finite element method (FEM) Differential Equations Analysis Library (DEAL), by Wolfgang Bangerth and others.

DOLFIN-CONVERT, a Python program which can convert mesh file from Gmsh, MEDIT, METIS or SCOTCH format to an XML format suitable for use by DOLFIN or FENICS, by Anders Logg.

MSH, a data directory of examples of MSH files, the native 3D mesh format used by gmsh.

TET_MESH_TO_GMSH, a C++ program which reads information defining a tet mesh, namely a file of node coordinates and a file of elements defined by node indices, and creates a corresponding Gmsh mesh file.

TRIANGULATION_TO_GMSH, a C++ program which reads information defining a trinagulation, namely a file of node coordinates and a file of elements defined by node indices, and creates a corresponding Gmsh mesh file.

Author:

Mikhail Artemiev

Reference:

A brief explanantion, and the current source code for tethex are available at http://code.google.com/p/tethex/wiki/Tethex.

Examples and Tests:

RECTANGLE is a simple mesh of a 2D rectangle. It was created by the MESH2D program, and written out as two files, one of node coordinates and one of triples of node indices that define a triangle. These two files were read by triangulation_to_gmsh, which converted them to a single msh file. Then tethex was used to convert the msh file of triangles into an msh file of quadrilaterals.

• rectangle_nodes.txt, the node coordinate file.
• rectangle_elements.txt, the element file.
• rectangle.png, an image of the original mesh, with nodes and elements labeled.
• rectangle.msh, the msh file, using triangles, created by Gmsh.
• rectangle_hex.msh, the msh file, using quadrilaterals, created by tethex.
• rectangle_hex.png, an image of the mesh, after modification by tethex.
• rectangle_output.txt, the output file from tethex.

You can go up one level to the EXAMPLES directory.