code_saturne User's Forum

Posted: **Thu May 14, 2020 9:54 am**

Hello,

I'm trying to improve one of my simulations changing the turbulence model in CS 6.0.0.
My simulation is very heavy and takes time to stabilize so I would rather make a restart from if.
The first simulation works with k-eps standard turbulence model and now I would like to use the spalart-allmaras model.
Yet I have this error when I tried it :

Code: Select all

 INSTANT    0.304425000E+00   TIME STEP NUMBER           60885
 =============================================================




/gpfs1/home/2006003/cbarna01/code_saturne-6.0.0/src/base/cs_field.c:1104: Fatal error.

Fortran pointer of rank 1 requested for values of field "velocity",
which have rank 2.


Call stack:
   1: 0x2b24317e4306 <cs_f_field_var_ptr_by_id+0x96>  (libsaturne-6.0.so)
   2: 0x2b2431eaaf21 <__field_MOD_field_get_val_s+0x21> (libsaturne-6.0.so)
   3: 0x401d60     <usvist_+0x53>                   (cs_solver)
   4: 0x2b24318bff17 <phyvar_+0x2e07>                 (libsaturne-6.0.so)
   5: 0x2b24318e5180 <tridim_+0xfb0>                  (libsaturne-6.0.so)
   6: 0x2b2431768412 <caltri_+0x20f2>                 (libsaturne-6.0.so)
   7: 0x2b24314bc8d5 <cs_run+0x5e5>                   (libcs_solver-6.0.so)
   8: 0x2b24314bc1b5 <main+0x175>                     (libcs_solver-6.0.so)
   9: 0x2b2435f56495 <__libc_start_main+0xf5>         (libc.so.6)
  10: 0x401249     <>                               (cs_solver)
End of stack

I attached my listing file, my setup file and the cs_user_physical_properties.f90 with my modifications (on viscosity calculation).
I think I miss something with the setup file but I don't know where exactly.

Thank a lot for your help.
Best regards,
Camille.

Posted: **Thu May 14, 2020 3:06 pm**

Hello,

I checked a similar issue a few weeks ago for another user, and it seems one or two combinations are not handled correctly (in cs_restart_default.c).

I'll try to check this soon and provide a "clean" patch in a few days at most.

Best regards,

Yvan

Posted: **Sat May 16, 2020 1:32 am**

Hello,

Actually, the issue is in your user subroutines.

Never just copy routines from one mjor version (5.0) to another (6.0), as the arguments mays change slightly, but instead merge the file with the new reference (using a tool like meld for example).

In you case, the main problem is that in usvist, you try to access cvar_k and cvar_ep, which are probably initialized to 0 (they should be initialized to -1 for a clearer message). As 0 is the velocity field id if fields are defined in the standard order, this causes your error.

Best regards,

Yvan

code_saturne User's Forum

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Restart from k-eps tubulence model with spalart-allmaras one

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Re: Restart from k-eps tubulence model with spalart-allmaras one