Grid Adaptation via Local Topology Modifications
The motion of the grid is carried out resorting to edge swapping, node insertion, node deletion and grid deformation.
Much more complex movements can
be
performed if the complete adaptation procedure is carried out. In Movie
4 a small circle rotates
around another
one and the result obtained
with the mesh deformation plus edge-swapping scheme is compared with
the one obtained using node insertion and deletion too.
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Movie 4. Rotation of
a circle, comparison between Deformation+Swapping
and
complete adaptation.
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Despite the
proximity of the boundaries, with respect to the mean size of the
elements, it is remarkable that such movement can be completed simply
resorting to the edge-swapping technique (left hand side). As expected,
the addition of a element refinement/deletion technique allows to
control the grid spacing and consequently to improve the overall
quality.