Hi,
I’ve simulated a problem in 2D where an odd symmetry boundary condition
is applied across the x=0 plane. I now want to visualize the full domain.
There seem to be three complications making Paraview capabilities that
I currently know about not workable. Maybe other’s can point out a pipeline
that works. If I need a programmable filter, so far I am lost at what to
implement.
1) My original data extends beyond the x=0 symmetry plane by two data
points. And I have no data point on x=0 itself. This is because in the
simulation, there is a third-order polynomial element centered on x=0.
2) My data is represented as Structured Curvilinear Grid (.VTS files)
though in actuality, it is rectilinear.
3) Some data arrays have odd symmetry, such that f(x<0) = -f(x>0)
Here’s what I’ve tried.
A) Use the Reflect filter, reflect about x=0. Works quite well for even
symmetry data, but the odd-symmetry data is misrepresented with opposite sign
for (x<0). Also, there are glitches with the doubled-up mesh points about x=0.
That becomes obvious when I tried to add a calculator to correct the odd
symmetry based on (x<0) boolean expression.
B) Manually select data points with (x>0); Extract Selection; Reflect that
extraction; Group original and new selection. Problem: I end up with a band
of missing data for the cell centered on x=0.
Ideally, I want to end up with a consistent full-domain representation such
that I can perform stream line traces across the x=0 mid-plane.
I’d be very grateful if anyone could point out a working solution. Here’s one
of my data files and some screenshots of my failed attempts. ( The scalar data
item EM_field_n_c4 is a good odd-symmetry example. )
VTS data file 800 kB
<https://dl.dropboxusercontent.com/u/54478577/supporting%20forum%20posts/paraview_odd_symmetry_help/harris_current_sheet_equilibreum_2.vts>
Existing Curvilinear Mesh representation
<https://dl.dropboxusercontent.com/u/54478577/supporting%20forum%20posts/paraview_odd_symmetry_help/By.jpg>
ProblemA demonstration of missing band about x=0
<https://dl.dropboxusercontent.com/u/54478577/supporting%20forum%20posts/paraview_odd_symmetry_help/missingband.jpg>
ProblemB demonstration of glitch at centerline
<https://dl.dropboxusercontent.com/u/54478577/supporting%20forum%20posts/paraview_odd_symmetry_help/glitch_at_centerline.jpg>
Best Regards,
Noah Reddell
University of Washington
_______________________________________________
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
Search the list archives at: http://markmail.org/search/?q=ParaView
Follow this link to subscribe/unsubscribe:
http://public.kitware.com/mailman/listinfo/paraview
