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.


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.