METIS MESH Files
METIS_MESH is a data directory which
contains examples of "mesh" files used by the
METIS program.
METIS can read a mesh file, and partition the elements
in a balanced way so that each partition has about the same
number of elements, while minimizing the number of cases in
which elements from different parts of the partition share
an edge or face. This process is designed with the idea
that the mesh represents a computation that is to be divided
up among various processors, with the stipulation that
the amount of interprocessor communication must be limited.
METIS MESH File Characteristics:

ASCII

a mesh of N elements is stored in a file of N+1 lines;

the first line lists the number of elements, and a code that
indicates the type of element;

2D triangles;

3D tetrahedrons;

3D hexahedrons ("bricks" with 6 sides and 8 vertices);

2D quadrilaterals;

each subsequent line lists the vertices of one element;

for triangular and tetrahedral elements, the vertices may be
listed in any order; quadrilateral and hexahedral elements
require that the vertices be listed in a particular order;

comment lines begin with a "%" sign;
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Reference:

George Karypis and Vipin Kumar,
METIS, a Software Package for Partitioning Unstructured Graphs
and Computing FillReduced Orderings of Sparse Matrices;

George Karypis and Vipin Kumar,
A fast and high quality multilevel scheme for partitioning
irregular graphs,
SIAM Journal on Scientific Computing,
Volume 20, Number 1, 1998, pages 359392;

http://www.cs.umn.edu/~metis,
The METIS home page;
Sample Files:

metis.mesh, a mesh of the
a region that looks like the word "METIS";

tri.mesh, a tiny example mesh
of a 2D region, using triangular elements;

tet.mesh, a tiny example mesh
of a 3D region, using tetrahedral elements;

quad.mesh, a tiny example mesh
of a 2D region, using quadrilateral elements;

hex.mesh, a tiny example mesh
of a 3D region, using hexahedral (brick) elements;
You can go up one level to
the DATA page.
Last revised on 01 May 2006.