DOKK / manpages / debian 10 / rheolef / mkgeo_ball.1rheolef.en
mkgeo_ball(1rheolef) rheolef-7.0 mkgeo_ball(1rheolef)

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



        mkgeo_ball options [n]

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 -

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.

2d mesh using triangles.
2d mesh using quadrangles.
2d mesh using both triangles and quadrangles.

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

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.

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.

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

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.
clear temporary files (this is the default).
does not clear temporary files.
print intermediate commands and information messages.

mkgeo_grid(1), mkgeo_ugrid(1)

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