2010/7/24 Fernando Diego <[email protected]>: > Hi people, > i have a question: ¿How do I combine 1d and 2d elements in the same mesh?. > I must generate a mesh with two elements (it's a didactic example only), one > in 2d (quadrilateral) and on the edge of it one element in 1d. > I sketched it: > > (node_4) _ _ _ _ _ _ _ _ _ (node_1) (node_1) x > x x | > | | > | > | element_1 (2d) | element_2 (1d) > | | > | > x_ _ _ _ _ _ _ _ _ x (node_2) x > (node_3) (node_2) > > Thnaks in advanced.
There's no restriction in the Gmsh .msh format on mixing elements of different shapes. http://geuz.org/gmsh/doc/texinfo/gmsh.html#MSH-ASCII-file-format So the following solves your didactic example problem: $MeshFormat 2.2 0 8 $EndMeshFormat $Nodes 4 1 0 1 0 2 0 0 0 3 -1 0 0 4 -1 1 0 $EndNodes $Elements 2 1 1 2 1 4 2 1 2 3 2 2 6 2 1 4 3 $EndElements I wrote that by hand. To generate it, probably the key step is defining the line for element_2 as a Physical Line and the square for element_1 as a Physical Surface. If the line is defined as a Physical Line, then your generated mesh file will automatically contain the corresponding one-dimensional elements. http://geuz.org/gmsh/doc/texinfo/gmsh.html#Elementary-vs-physical-entities _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
