Autodecide

By default, the perimeter of the region is traversed looking for variations in element edge length and choose between size-correcting and shape-correcting smoothing algorithms.

Size Corrected

The size-corrected smoothing algorithm attempts to even out the sizes of the elements at the cost of some element quality, usually in the form of worsened aspect ratios from the stretching of elements. A modified Laplacian over-relaxation that can correctly handle mixtures of quads and trias is used.  If the element spacing around the perimeter is roughly uniform, this choice usually gives the best results.

Shape Corrected

The shape-correcting smoothing algorithm attempts to correct the elements’ shapes, allowing variation in element size.  HyperMesh uses a modified isoparametric-centroidal over-relaxation that can correctly handle mixtures of quads and trias.  If there is a transition from small elements to large elements in the region, this choice usually gives the best results.