I am guessing that Vorticity in your dataset is a 3D vector (which is typical) and that Q Criterion is a scalar.
When you take the gradient of a vector, you get a 3x3 tensor (an estimate of the Jacobian matrix, I believe). These 9-tuples are not as widely recognized in ParaView/VTK filters as scalars and vectors so they will not be listed in selection combo boxes for inputs. You should still see the entry listed in the Information panel, though. In contrast, when you take the gradient of a scalar, you get a vector, which is understood by and leveraged by many filters. -Ken On 6/6/12 9:04 AM, "Ricardo Reis" <[email protected]> wrote: > > When using the filter > > GradientOfUnstructuredDataSet1 > > and selecting Vorticity, this result doesn't become available. On the >other hand Q Criterion becomes available under the right moniker... > > Is this expected? > > best, > > Ricardo Reis > > -- > > PhD/MSc Mechanical Engineering | Lic. Aerospace Engineering > > Computational Fluid Dynamics, High Performance Computing, Turbulence > http://www.lasef.ist.utl.pt > > Cultural Instigator @ Rádio Zero > http://www.radiozero.pt > > http://www.flickr.com/photos/rreis/ > > contacts: gtalk: [email protected] skype: kyriusan > > Institutional Address: > > Ricardo J.N. dos Reis > IDMEC, Instituto Superior Técnico, Technical University of Lisbon > Av. Rovisco Pais > 1049-001 Lisboa > Portugal > > - email sent with alpine 2.00 - _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
