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mkgeo_ballrheolef - Online in the Cloud

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PROGRAM:

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 comand line:

mkgeo_ball -t 10 | geo -mayavi -

DESCRIPTION


This command is usefull 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. Defualt 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.

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