Ansys Meshing - Match Control
Written by cfd.ninja
April 16, 2020
Match Control makes two faces receive exactly the same mesh, so that every node on one has a twin on the other. Without that correspondence a periodic boundary cannot pair its cells and the solver has to interpolate across the interface.
The relation between the faces is either a rotation about an axis, for the periodic sectors of fans, pumps and turbines, or a translation, for repeating geometries such as channels and tube banks.
The payoff is the size of the model. Meshing a single sector rather than the complete geometry divides the cell count by the number of passages, which often turns an impossible case into one that runs on a laptop.
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