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Reference: ParaView Version 4.3.1 I have two technical questions: (1) In the PV filter 'Gradient Of Unstructured Data Set' is the "QCriterion" function, the Q-Criterion defined by G. Haller in "An objective definition of a vortex," J. Fluid Mech. (2005), vol. 525, pp.1–26? (2) In the PV filter 'Calculator' what is the formula used by the "mag" function to calculate mag(S) where S is a symmetric 2nd-order tensor? Using matrix notation, the tensor S would have the following components: --------------- | Sxx Sxy Sxz | | Sxy Syy Syz | | Sxz Syz Szz | --------------- Thanks in advance for the bother, Samuel W Key FMA Development, LLC 1005 39th Ave NE Great Falls, Montana 59404 USA |
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