Quality
This step does not change the case. It reads the report that checkMesh
produced for the mesh currently on disk, and turns the numbers into
recommendations you can apply to the steps that do change the case —
Numerics and Boundary layers.
Because the figures come from the last mesh that was generated, they say nothing about settings you have edited since. Regenerate the mesh before trusting them.
Where it is
Section titled “Where it is”Setup tree: Mesh > Quality
Controls
Section titled “Controls”Recommendations
Section titled “Recommendations”Apply to numerics
Section titled “Apply to numerics”- Control: action (
ToolButton2)
Apply to mesh settings
Section titled “Apply to mesh settings”- Control: action (
ToolButton2)
Re-run checkMesh
Section titled “Re-run checkMesh”- Control: action (
ToolButton2)
Lists this panel shows
Section titled “Lists this panel shows”Read straight from the data behind the panel, not from a hand-written list.
checkMesh
Section titled “checkMesh”From a fixed list in the application.
| metric | limit |
|---|---|
| Cells | |
| Max non-orthogonality | < 70° |
| Max skewness | < 4 |
| Max aspect ratio | < 100 |
| Min tet quality | > 1e-9 |
| Negative volumes | 0 |
| Layer coverage (body) | > 70% |
Problems reported against this step
Section titled “Problems reported against this step”The application checks these before a run and reports them in the Problems tab against this step.
| Severity | Message |
|---|---|
| error | Max non-orthogonality … deg exceeds 70 - the run is likely to diverge. |
| warn | Max non-orthogonality … deg - schemes set to ‘limited 0.5’ with 1 non-orthogonal corrector. |
| error | The mesh has cells with an aspect ratio of … - they have been squashed flat, most likely by the boundary layers. The solver cannot use this mesh: the pressure equation diverges immediately. Reduce the layer count or the expansion ratio and mesh again. |
… marks a value the application computes at run time, so the source carries no fixed text for it.