Ansys Meshing - Mapped & Match Control
Written by cfd.ninja
Match Control forces two faces to receive an identical mesh, node for node. It exists for periodic models: when you simulate a single blade passage of a turbine instead of the whole wheel, the solver needs the two periodic boundaries to match exactly so it can pair the cells across them.
The two faces are related either by a rotation about an axis, which covers rotational periodicity in fans, pumps and turbines, or by a translation, which is what repeating channels and tube banks need.
Meshing a single passage instead of the full geometry cuts the cell count by an order of magnitude, and that is usually the difference between a case that runs overnight and one that does not run at all. Combining it with Face Meshing on the source face keeps the pattern regular on both sides.
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