HOMARD : Le huayangosaure ... |
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This strange name refers to a prehistoric animal with shells on its back. It is used to illustrate the scope of the HOMARD
software package. Among others, HOMARD is capable of processing meshings with 1D, 2D or 3D areas.
This is in analogy with a problem whereby volume,
surface and line problems are under study ; For instance, this is what happens with electromagnetism,
where magnetic field densities occur in
volumes, potentials on shells and current in wires. The areas of differing dimensions may be separated or not.
At all events, HOMARD knows how to
manage refinement propagation from one area to the other.
We simulate the presence of error indicator by the request of refinement on the elements, as no
calculation software is interfaced with HOMARD for this meshing of demonstration.
Below are the initial meshing and the results from the first and second adaptation process.
To represent the animal, our meshing is comprise of :
[ Top | Meshing #0 | Meshing #1 | Meshing #2 | Images ]
 
We have requested refinement of the meshing in the middle of the neck,
in the last shell and in front part of the body.
By examining the meshing obtained, one can see that the neck segment was split in two.
In the rear shell, both of the selected triangles have been
split in four, then the adjacent triangles underwent compliance splitting.
The refinement required for the front section of the body resulted in
splitting in 8 both of the selected tetrahedrons. Then, for compliance in volume,
neighboring tetrahedrons were split in four or in two. Lastly,
compliance made it necessary to split the front shell triangles that are in
contact with the volume.
We have :
[ Top | Meshing #0 | Meshing #1 | Meshing #2 | Images ]
 
We continued refinement the same areas.
One can see that on the rear of the animal, shell splitting on two levels introduces
a non-compliance point on the body/shell joint. As a result,
refinement propagates within the body.
Also, in the front section, continued refinement in volume is perceived on the first shell.
We have :
[ Top | Meshing #0 | Meshing #1 | Meshing #2 | Images ]
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