[anothr_acc]

Hi everyone,

I'm using the snappyHexMesh castellatedMesh step on its own, to refine up to 7 or 8 levels from an original blockMesh with nCellsBetweenLevels 3. I have a surface defined in an STL file. The surface is being picked up ok but as I increase my refinement level beyond 6 I start getting 0 determinant cells and checkMesh tells me I have nearPoints (closer than 1.5e-06 apart). Yet, inspection of the problem cells in paraFoam shows good looking cubes that are in reasonable places. It is possible that snappy is stopping before full refinement has occurred but I wonder:

How can I tighten the spatial tolerances in snappy?

I have adjusted my controlDict writePrecision to 8 and my mergeTolerance in snappyHexMeshDict to 1E-8 but this seems not to help. Any pointers would be welcome!

Best regards,

Mark.