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mkgeo_ball(1rheolef) rheolef-7.0 mkgeo_ball(1rheolef)

NAME

mkgeo_ball -- build an unstructured mesh of an ellipsoid, in 2d or 3d

SYNOPSIS

        mkgeo_ball options [n]

EXAMPLE

The following command build a triangle based 2d unstructured mesh of the unit ball

        mkgeo_ball -t 10 > ball-10.geo
        geo -mayavi ball-10.geo

or in one command line:

        mkgeo_ball -t 10 | geo -mayavi -

DESCRIPTION

This command is useful when testing programs on simple geometries. Invocation is similar to mkgeo_grid (see mkgeo_grid(1), mkgeo_ugrid(1)). It calls 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.

ELEMENT TYPE OPTIONS

-t
2d mesh using triangles.
-q
2d mesh using quadrangles.
-tq
2d mesh using both triangles and quadrangles.

THE MESH ORDER

-order int
The polynomial pproximation mesh order, for the curved boundary, as defined by gmsh. Default is order=1.

THE GEOMETRY

The geometry can be ellipse/ellipsoid inscribted in the [a,b]x[c,d] rectangle or the [a,b]x[c,d]x[f,g] parallelotope. By default a=c=f=-1 and b=d=g=1, thus, the unit balls are considered.
-s
Only a surface mesh is generated: a curved line in 2d or a curved surface mesh in 3d. In 3d, supports both '-t' and '-q' options.
-a float
-b float
-c float
-d float
-f float
-g float

BOUNDARY DOMAINS

The meshes defines a domain named boundary that groups all boundary sides.

OTHERS OPTIONS

-fix
-nofix
By default, internal face and volume node from gmsh are recomputed, since they have incorrect coordinate that destroy the convergence properties of isoparametric high order elements (order >= 3). The -nofix option skip this correction: this option is available for test purpose.
-clean
clear temporary files (this is the default).
-noclean
does not clear temporary files.
-verbose
-noverbose
print intermediate commands and information messages.

SEE ALSO

mkgeo_grid(1), mkgeo_ugrid(1)

COPYRIGHT

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-7.0 rheolef-7.0