mkgeo_ugrid - unstructured mesh of a parallelepiped (rheolef-7.2)

       Pierre  Saramito  <Pierre.Saramito@imag.fr>

       -[no]sides

            The boundary sides are represented by domains: left, right, top, bottom, front and back.

       -[no]boundary

            This option defines a domain named boundary that groups all sides.

       -cartesian
       -rz
       -zr

            Specifies the coordinate system. The default is cartesian while -rz and -zr denotes some
           axisymmetric coordinate systems. Recall that most of Rheolef codes are coordinate-system independent
           and the coordinate system is specified in the geometry file .geo.

       Copyright   (C)  2000-2018  Pierre  Saramito  <Pierre.Saramito@imag.fr> GPLv3+: GNU GPL version 3 or
       later  <http://gnu.org/licenses/gpl.html>.  This  is  free  software:  you  are free to change and
       redistribute it.  There is NO WARRANTY, to the extent permitted by law.

rheolef                                            Version 7.2                             mkgeo_ugrid(1rheolef)

       -[no]corner

            The corners (four in 2D and eight in 3D) are defined as OD-domains. This could be useful for some
           special boundary conditions.

       This command is useful when testing programs on simple geometries. Invocation is similar to those of
       mkgeo_grid(1) . It callsg gmsh as unstructured mesh generator. It avoid the preparation of an input file
       for a mesh generator. The optional n argument is an integer that specifies the subdivision in each
       direction. By default n=10. The mesh files goes on standard output.

       The command supports all the possible element types: edges, triangles, rectangles, tetrahedra, prisms and
       hexahedra. It supports also mixed 2D with triangles and quadrangles:

           mkgeo_ugrid -tq 10 | geo -

        and mixed 3D with tetraedra, prisms and/or hexahedra:

           mkgeo_ugrid -TP  10 | geo -paraview -
           mkgeo_ugrid -PH  10 | geo -paraview -
           mkgeo_ugrid -TPH 10 | geo -paraview -

       -e

            1d mesh using edges.

       -t

            2d mesh using triangles.

       -q

            2d mesh using quadrangles (rectangles).

       -T

            3d mesh using tetrahedra.

       -P

            3d mesh using prisms.

       -H

            3d mesh using hexahedra.

       -tq

            2d mesh using both triangles and quadrangles.

       -TP
       -PH
       -TPH

            3d mixed mesh combining tetrahedra, prisms and/or hexahedra.

           mkgeo_ugrid -t 10 > square-10.geo
           geo square-10.geo

        The previous command build a triangle based 2d unstructured mesh of the unit square:

       This documentation has been generated from file main/sbin/mkgeo_ugrid.sh

       mkgeo_ugrid - unstructured mesh of a parallelepiped (rheolef-7.2)

       -[no]region

            The whole domain is split into two subdomains: east and west. Also, the separating domain is named
           interface in the mesh. This option is used for testing computations with subdomains (e.g.
           transmission problem; see usersguide ).

       mkgeo_ugrid [options] n

       -a float
       -b float
       -c float
       -d float
       -f float
       -g float

            The geometry can be any [a,b] segment, [a,b]x[c,d] rectangle or [a,b]x[c,d]x[f,g] parallelepiped. By
           default a=c=f=0 and b=d=g=1, thus, the unit boxes are considered.

       This option is related to curved boundaries. Since boundaries are here flat, this option has no practical
       effect and is provided for test purpose only.

       -order int

            The polynomial approximation mesh order, as defined by gmsh. This option enable a possible curved
           boundary, when applying a suitable nonlinear transformation to the mesh. Default is order=1.