When the centroids of two elements are too close together, this indicates that the mesh is not ideal and needs to be fixed.
Ideal mesh elements are shown in the left-hand image, below. Non-ideal element are shown in the right-hand image and can be readily identified by the relative location of their centroids
- Triangle elements that are too close together (closer than one tenth of either element's average edge length), are identified on the plot legend as Error .
- Triangle elements that are verging on being too close together (closer than one tenth of either element's average edge length), are identified on the plot legend as Warning .
