Error when calculating patch interpolation coefficients

Error when calculating patch interpolation coefficients#

When running a case with a rotational volume zone, if you get a solver error that looks like this:

Error when calculating patch interpolation coefficients. Patch has a distance mismatch of 0.7883948e-01
with matching patch at location [1.7592032e-1, 1.0184957e-03, -4.7304816e-1].

This means that at a given time step, once the mesh has been rotated according to the prescribed motion, the maximum distance between the two interfaces is 0.7883948e-01. If this maximum distance between the two patches is greater than 20% of the maximum edge length contained in either patch, this error will be raised. It indicates that either the center of rotation/axis of rotation is likely incorrect or that the mesh is too coarse in this location.

If the two patches are intentionally separated and exchange no data (for example, both sides have wall boundary conditions), relax the check by raising the interface interpolation tolerance, interface_interpolation_tolerance. It is unrelated to the meshing sliding interface tolerance, which only affects mesh generation.