A Derivative-Free Mesh Optimization Algorithm for Mesh Quality Improvement and Untangling

Figure 6

Note that a smaller value indicates a better element quality for these figures. The inverse mean ratio quality metric is employed to measure the element quality for (a) and (b): (a) worst element quality as a function of number of iterations of mesh optimization on the cylinder mesh. (b) Worst element quality as a function of number of iterations of mesh optimization on the bar mesh. (c) Number of inverted elements on the hydrocephalus mesh as a function of number of iterations of mesh optimization. (d) Number of inverted elements on the airfoil mesh as a function of number of iterations of mesh optimization.

(a) Cylinder mesh

(b) Bar mesh

(c) Hydrocephalus mesh

(d) Airfoil mesh