[Paraview] Testing CGNS reader with PV 3.6.1 and VisIt plugin

[Richard GRENON]

Hello.

I have made several tests with the CGNS reader. Some files are readable, 
some other files are freezing PV.

1. Here is an exemple from the CGNS site that contain both grid and CFD 
solution for a delta wing and that works:
http://cgns.sourceforge.net/CGNSFiles/Chris/delta.cgns.gz

2. CGNS files that contain only the grid also work. Tested large ONERA 
CGNS files and STANFORD CGNS test files. Here is a STANFORD test file 
for the supersonic business jet:
http://aero-comlab.stanford.edu/vdweide/CGNSFiles/BusinessJet.cgns

3. Trying to include the CFD solution file does not work. Here are the 
two STANFORD solution files for the supersonic business jet:
http://aero-comlab.stanford.edu/vdweide/CGNSFiles/SolBusinessJet.cgns = 
volume solution file.
http://aero-comlab.stanford.edu/vdweide/CGNSFiles/SolBusinessJet.cgns_surface 
= surface solution file.

Reading the surface solution file works, but nothing is visible. The 
information panel shows strange very big values for X, Y, Z bounds 
(almost infinte)!
Trying to read the volume solution file freezes Paraview.

The same problem arises withthe DLR F6 wing-body example:
http://aero-comlab.stanford.edu/vdweide/CGNSFiles/wb_hex_coarse.cgns = 
grid for the DLR F6 wing-body is readable.
http://aero-comlab.stanford.edu/vdweide/CGNSFiles/WBSolKW.cgns = 
solution file => freezes PV.

4. Conclusion:
Good job to have added CGNS and Tecplot support to PV (Tecplot tested 
without a problem until now).
VisIt plugin can read CGNS grid files (even large) or single files 
including both grid and CFD solution works.
But still some problems in CGNS when the grid and the CFD solution are 
in separated files.

-- 
 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:Richard.Grenon at onera.fr
 http://www.onera.fr