How good are our cells? - Tetrahedrons - Hexahedrons - Polyhedrons Why do bad meshes result in solution divergence? # Recommended Mesh Quality Metrics | Metric | Stable Solution | Accurate Solution | Ideal mesh | | -------------------------- | --------------- | ----------------- | ---------- | | [[Aspect Ratio]] | < 1000 | < 10 | 1 | | [[Jacobian Determinant]] | > 0.1 | > 0.2 | 1 | | Face [[Non-Orthogonality]] | < 70&deg; | < 60&deg; | 0&deg; | | [[Equiangle Skewness]] | < 0.95 | < 0.9 | 0 |