Try clipping and otherwise subsetting the original geometry to make the seeds and use that as the source in the "Stream Tracer with Custom Source" filter.
David E DeMarle Kitware, Inc. R&D Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909 On Thu, Mar 29, 2012 at 9:25 AM, Lorenzo <[email protected]> wrote: > Hi all; > I managed to calculate the wall shear stress in openFoam using the command > wallShearStress -latestTime > and using the results (vector) as in input for the LIC! > > That's great! > > Now I'd have another question related to this topic: > as I see the LIC is pretty heavy in paraview even though mine is a small > geometry. I'm wondering, once I've loaded the wall shear stress, I could use > the stream tracer on it to get more or less what I want. The only problem I'm > having is that the line that generates the streamlines needs to be exactly on > the surface of my body. Is there any way to attach the line to the surface? > > Thank you again! > > > > Il giorno 29/mar/2012, alle ore 11:24, Richard GRENON ha scritto: > >> Hi Lorenzo. >> >> If your data are the results of a CFD computation, the surface velocity >> should be non zero when solving Euler equations with wall slip conditions, >> or zero everywhere when solving the Navier-Stokes equations with wall >> adherence conditions (non slip). But when solving Navier-Stokes equations, >> you should get a skin friction vector (local tangential force) that is non >> zero: for LIC to give an oilflow pattern, you should use this skin friction >> vector instead of the velocity vector. >> >> And please, could you tell us what was the solution given by Koen? His mail >> was missing. >> >> Richard. >> >> Lorenzo a écrit : >>> Thanks both of you, your help is really appreciated! >>> >>> @ Richard: as I'm using the non slip condition for my walls geometry, the >>> velocity on the surface is 0 everywhere… Just checked and the vector I get >>> with the calculator is made by zeroes only… so, what is not clear to me, is >>> how do I give the LIC a vector which is not zero? >>> >>> @ Koen: that worked. Any way to reduce the number of oilflow paths? >>> >>> Again, I would like to thank you two and everybody else in this mailing >>> list for your help. >>> >>> Lorenzo >> >> -- >> Richard GRENON >> ONERA >> Departement d'Aerodynamique Appliquee - DAAP/ACI >> 8 rue des Vertugadins >> 92190 MEUDON - FRANCE >> phone : +33 1 46 73 42 17 >> fax : +33 1 46 73 41 46 >> mailto:[email protected] >> http://www.onera.fr >> > > _______________________________________________ > 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
