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[General] Define Q in Python Calculator of Paraview

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Old   April 14, 2018, 09:59
Default Define Q in Python Calculator of Paraview
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Chen Di
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Dear all,

I intend to use Q-criterion or Lambda-2 to visualize vortex in Paraview, can anyone show me the correct code I should type in the expression box?
For lambda-2, it should be something like "eigenvalue(strain(Velocity)**2 + (Gradients strain(Velocity))**2), but there always appears syntax error.
Please help, thank you in advance.

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paraview 4.2

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