“…Fig. 6 assesses the sensitivity of the approach to mesh quality: Good quality triangles are quasi-equilateral (Q-factor <2) and poor triangles are those possessing either a small (<10°) or a large (>170°) angle [20,21]. The Delaunay mesh refinement process recursively splits poor triangles at their circumcentre to achieve either better quality or smaller elements, so it is actually difficult to generate small element area, poor quality, meshes as splitting for area naturally improves the quality as well.…”