The Tesselate filter will linearize quadratic elements. We will check the issue with the quadratic triangle also.
-berk On Thu, May 22, 2014 at 9:50 AM, Andy Bauer <[email protected]> wrote: > Hi Andreas, > > The best way I can think of to get this working in ParaView is to use the > programmable filter to convert to linear triangles. You can also subdivide > the triangles if you want to maintain your higher order accuracy. > > Regards, > Andy > > > On Wed, May 21, 2014 at 5:32 PM, Andreas Hessenthaler < > [email protected]> wrote: > >> Indeed, my smaller mesh had linear triangles. And changing that to >> quadratic triangles gives the same behavior (attachment). >> >> What is the best way to circumvent this? >> >> The reason why I wanna use the vorticity function is the following: >> eddies appear all over the domain and using lines with the streamtracer >> filter gives regions with either no streamlines or regions that are very >> much crowded by streamlines. Therefore, having a vorticity field would be a >> suitable approach to have a nice and clean visualization of the flow field. >> >> Cheers >> >> >> Am 21-May-2014 17:00:55 +0200 schrieb [email protected]: >> >> It looks like these are quadratic triangles. I'm not sure that the >> compute derivatives filter works with that type of cell. Did your smaller >> grid also have quadratic cell types? >> >> >> On Wed, May 21, 2014 at 9:51 AM, Andreas Hessenthaler wrote: >> >>> Hi Andy, >>> >>> thanks for your quick reply. Please find the *.vtu file attached. >>> >>> Cheers >>> Andreas >>> >>> >>> >>> >>> Am 21-May-2014 15:24:30 +0200 schrieb [email protected]: >>> >>> Can you share your data set? It will be difficult to diagnose without >>> that. >>> >>> >>> On Wed, May 21, 2014 at 9:06 AM, Andreas Hessenthaler wrote: >>> >>>> Hi there, >>>> >>>> I have the following problem: >>>> >>>> When I calculate the vorticity through Filters > Compute Derivatives > >>>> Vorticity for a simple example (driven cavity in 2D) with only few elements >>>> on an unstructured grid I get the correct values. >>>> >>>> Though, when I do the same for a bigger domain, i.e. more elements (~80 >>>> 000 nodes), I only get zero vorticity values. >>>> >>>> The grids and values are all read in from *.vtu files, with the exact >>>> same format, meshes are triangluar 2D (z-components set to 0.0). >>>> >>>> I can reproduce the behavior on different versions of ParaView: 3.14.1 >>>> & 4.1.0 as well as different operating systems: Windows 7 & Ubuntu 14.04. >>>> >>>> If I calculate the gradient of the velocity field, all values are >>>> calculated as zero as well. >>>> >>>> Thanks in advance! >>>> >>>> Cheers >>>> Andreas >>>> >>>> _______________________________________________ >>>> 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 >>>> >>>> > > _______________________________________________ > 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 > >
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