# Moldflow

Moldflow-specific checks used to calculate element quality for 2D and 3D elements.

Additional element checks not listed here are not part of the solver’s normal set of checks, and therefore use HyperMesh check methods.

## 2D and 3D Element Checks

These checks apply to both types of elements, but when applied to 3D elements they
are generally applied to each face of the element. The value of the worst face is
reported as the 3D element’s overall quality value.

- Aspect Ratio
- Only applied to triangles, with quadrilaterals given a value
of:$$\frac{2.0}{\sqrt{3}}$$

## 3D Element Only Checks

- Vol. Aspect Ratio
- Finds the perpendicular height h of each node, and then dividing the
longest edge length L by the shortest height h and multiplying by the
square root of 1.5:$$\frac{\sqrt{1.5}\times L}{h}$$This results in an equilateral tetrahedron having a volume aspect ratio of 1.5. Non-tetrahedral elements are assigned a value of 1.0.