Search found 4070 matches

by Yvan Fournier
Tue Nov 25, 2014 10:08 pm
Forum: code_saturne usage
Topic: Enthalpy initialisation with code_saturne 3.2
Replies: 3
Views: 3300

Re: Enthalpy initialisation with code_saturne 3.2

Hello,

If you dont' post at least your user subroutines and xml file, it will be hard to check what is wrong.

Regards,

Yvan
by Yvan Fournier
Mon Nov 24, 2014 1:42 pm
Forum: code_saturne usage
Topic: Periodic Boundary Conditions and CGNS
Replies: 5
Views: 4063

Re: Periodic Boundary Conditions and CGNS

Hello, I was not aware that ICEM exported HDF5-based CGNS files with an HDF5 extension instead of CGNS (but then again, ICEM have done strange things in the past, such as cheating on the CGNS version number)... The .hdf5 extension is also used by other formats (such as the Salome Platform's study fi...
by Yvan Fournier
Fri Nov 21, 2014 5:17 pm
Forum: code_saturne usage
Topic: Periodic Boundary Conditions and CGNS
Replies: 5
Views: 4063

Re: Periodic Boundary Conditions and CGNS

Hello, I recommend exoporting the file as an unstructured file: though the reader may handle both, unstructured is more natural, and can handle boundary conditions at faces, not nodes, which requires less conversion steps. For the crash, using periodicity incurs a mesh joining step, which is where t...
by Yvan Fournier
Fri Nov 21, 2014 5:09 pm
Forum: code_saturne usage
Topic: Wall shear stress calculation
Replies: 20
Views: 14433

Re: Wall shear stress calculation

Hello, In your code: f(iturb.eq.42.and.idries.eq.0) then tau = romc*uet**2 tau0 = 0.0d0 uet0 = 0.0d0 if (ntcabs .gt. 3600) then tau0 = tau0+tau uet0 = uet0+uet endif usertau(ifac) = tau0 userutau(ifac) = uet0 endif you are resetting tau0 at each time step, even when you are trying to accumulate thin...
by Yvan Fournier
Fri Nov 21, 2014 4:59 pm
Forum: code_saturne usage
Topic: Fatal error (divergence) solving for Enthalpy
Replies: 13
Views: 6613

Re: Fatal error (divergence) solving for Enthalpy

Hello, I won't have the time to look at this before a few days (though other members of this forum might). Did you follow most of the troubleshooting recommendations in the documentation section of this web site ? I'm especially thinking of the time step and CFL, because in may cases, electric arcs ...
by Yvan Fournier
Wed Nov 19, 2014 6:42 am
Forum: code_saturne usage
Topic: Wall shear stress calculation
Replies: 20
Views: 14433

Re: Wall shear stress calculation

Hello,

Could you please follow the forum usage recommendations and post the complete user files ? I suspect you forget to add a "save" attribute, but can't check with just a snippet.

Regards,

Yvan
by Yvan Fournier
Mon Nov 17, 2014 5:36 am
Forum: code_saturne usage
Topic: Some problems on wall shear stress calculation
Replies: 4
Views: 3384

Re: Some problems on wall shear stress calculation

Hello,

See my answer in what appears somewhat of a duplicate:

http://code-saturne.org/forum/viewtopic ... t=10#p8369.

Regards,

Yvan
by Yvan Fournier
Mon Nov 17, 2014 5:32 am
Forum: code_saturne usage
Topic: Wall shear stress calculation
Replies: 20
Views: 14433

Re: Wall shear stress calculation

Hello, There were some fixes since 3.0.3, so I really recommend upgrading to patch release 3.0.5 (3.0.6 should be released with 2 or 3 weeks). Did you call the "init_user_module" somewhere after reading the mesh but before the time loop (for example, in cs_user_initialization.f90/usiniv) ?...
by Yvan Fournier
Sat Nov 15, 2014 3:00 am
Forum: code_saturne usage
Topic: Turbomachinery and mixing planes
Replies: 7
Views: 5946

Re: Turbomachinery and mixing planes

Hello, There are several threads on this Forum from about 6 months ago relating to turbomachinery cases, which may help you get started. They relate mostly to version 3.2, but things have not changed too much in this regard since (except turbomachinery cases may now be handled using the GUI). I can ...
by Yvan Fournier
Wed Nov 05, 2014 2:55 am
Forum: code_saturne usage
Topic: Pulverized coal and slagging TUTORIAL
Replies: 30
Views: 21045

Re: Troubles with Pulverized coal and slagging TUTORIAL

Hello, To avoid the "enthalpy" error, you should edit the user law for initialization, and replace temperature with enthalpy. Still, trying this, you may have other crashes later on. The GUI has some amount of automatic updating from 1 version of the code to another, but it is not quite co...