Discontinuity in output of GradientOfUnstructuredDataSet

ParaView Support
1

I currently have a snapshot of a CFD simulation in CGNS format with 10 zones as shown below.

zones
zones.png908×593 43.3 KB

When I calculate Q-Criterion with the GradientOfUnstructuredDataSet filter, discontinuities appear at the zones’ boundaries. I’m pretty sure that’s happening because paraview is not understanding that it should use points from the next (or previous) zone in the derivative calculations, even though the CGNS file does have a GridConnectivity node, and ends up treating that location as a boundary.

qcriterion
qcriterion.jpg902×590 97.9 KB

Does anyone know how I could inform paraview to use proper points from other blocks of data or something in this sense that could fix my issue?

Thank you in advance

2

Well, in case someone stumbles into this problem, I solved it by creating a new vtkStructuredGrid with all the blocks appended. I was able to do that with a programmable filter.