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[General] Gradient of curvilinear data set (structured)

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Old   August 22, 2018, 11:50
Default Gradient of curvilinear data set (structured)
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Hello.
I'm trying to calculate the gradient of a curvilinear data set I have.
I've tried using the Gradient Of Unstructured Dataset filter, but the computed values are not accurate.
I think this is probably because the data I'm using, which is opened as a Tecplot file, is not handled as structured data when going through the filter.

Is there another filter I can use for structured data?
How can the data in the attached file be opened as structured data in Paraview, and how can the gradient of the variable "WAVPHI" be computed as structured data?

Thank you in advance.
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