Sorry. I forgot to add an address of PV mailing list.
Magician On 2013/03/20, at 10:33, Magician wrote: > Hi Tony, > > > I discussed similar problems. > <http://www.paraview.org/pipermail/paraview/2012-June/025273.html> > > The interpolation and integration method (both space and time domain) > of ParaView are very simple, but not ideal. > ParaView splits all cells into tetrahedra or triangle and > interpolate values with linear algorithm. > I haven't research FIELDVIEW's method yet, but it may be different from PVs. > > > Magician > > > On 2013/03/20, at 4:13, [email protected] wrote: > >> Hi Tony, >> >> What kind of cells are these? Can you make the data available to us? >> >> -berk >> >> >> On Tue, Mar 19, 2013 at 12:16 PM, Tony McDaniel >> <[email protected]>wrote: >> >>> I'm using the Probe Location filter to extract data from a 3D CFD solution >>> for an internal flow, and I'm not getting the data that I should be for >>> some (but not all) of the points. The dataset is approximately 7 million >>> nodes saved in Ensight format. >>> >>> I'm comparing the data returned by Paraview to the data at the same >>> locations in FieldView. For licensing reasons, I would prefer to use >>> Paraview for this research, but I also need accurate solutions. >>> >>> For two representative probe locations, I have the following results: >>> x y z pv_density fv_density pv_pressure fv_pressure >>> 0.3912 -0.0376 -0.0566 0.9040 0.9040 67779.9 >>> 67779.9 >>> 0.3912 -0.0426 -0.0516 0.8275 0.8623 65849.0 >>> 66176.3 >>> >>> The first point matches precisely between Paraview and FieldView. However, >>> the second point is substantially different. In addition, the velocity at >>> point two is {0,0,0} indicating that the point is on the boundary, though >>> it is not actually. >>> >>> Looking at color plots in Paraview, the color under the point location >>> clearly matches the numbers from FieldView. I've uploaded plots showing >>> pressure in the plane containing the two locations here: >>> https://dl.dropbox.com/u/**744216/probe1.png<https://dl.dropbox.com/u/744216/probe1.png> >>> https://dl.dropbox.com/u/**744216/probe2.png<https://dl.dropbox.com/u/744216/probe2.png> >>> >>> The values are wrong for points that are close to the boundary, and match >>> FieldView for points away from the boundary. I have also tried importing >>> the locations from a CSV file and using the Resample Dataset and get the >>> same values. >>> >>> Can anyone shed light on why this is happening? > _______________________________________________ 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
