Ansys Meshing - CutCell
Written by cfd.ninja
CutCell builds a mesh by starting from a Cartesian grid of hexahedra and cutting it against the geometry, so the interior stays regular and only the cells touching the surface are reshaped.
The appeal is a mostly hexahedral mesh with almost no preparation of the geometry, which is very different from the slicing work a sweepable mesh usually demands. The weakness shows on the surface, where the cut cells can come out distorted on curved or thin features.
It is worth knowing that newer Ansys releases moved in another direction, towards the mosaic and poly-hexcore meshing inside Fluent, which follows the same idea of a regular interior but joins it to the boundary layer with polyhedral cells.
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