| mkgeo_ball(1rheolef) | rheolef | mkgeo_ball(1rheolef) |
NAME¶
mkgeo_ball - unstructured mesh of an ellipsoid (rheolef-7.2)
SYNOPSIS¶
mkgeo_ball [options] [n]
EXAMPLE¶
mkgeo_ball -t 10 | geo -
The previous command build a triangle based 2d unstructured mesh of the unit ball
DESCRIPTION¶
This command is useful when testing programs on simple geometries. Invocation is similar to those of mkgeo_grid(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.
THE MESH ORDER¶
-order int
The polynomial approximation mesh order, for the curved boundary, as defined by gmsh. Default is order=1.
ELEMENT TYPE OPTION¶
-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.
THE GEOMETRY¶
-a float
-b float
-c float
-d float
-f float
-g float
The geometry can be ellipse/ellipsoid inscribed in the [a,b]x[c,d] rectangle or the [a,b]x[c,d]x[f,g] parallelepiped. 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.
BOUNDARY DOMAINS¶
The meshes defines a domain named boundary that groups all boundary sides.
OTHERS OPTIONS¶
-[no]fix
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.
-[no]clean
Clear temporary files (this is the default).
-[no]verbose
Print intermediate commands and information messages.
IMPLEMENTATION¶
This documentation has been generated from file main/sbin/mkgeo_ball.sh
AUTHOR¶
Pierre Saramito <Pierre.Saramito@imag.fr>
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.
| Mon Sep 19 2022 | Version 7.2 |