code_saturne User's Forum

Hello, I wrote a large code inside cs_user_boundary_conditions_ale.f90 to impose some desired mesh displacement, in the version 7 of CS. I would like to move to v8, but the cs_user_boundary_conditions_ale.f90 does not exist anymore. Is there a workaround to make it work on v8, to avoid writing one i...

Hi Sean, Thank you for explaining in details your issue. I misunderstood that it was actually purely a numerical problem, not linked with the physics. The flows in which I faced the clipping issue were iso-thermal. And the clipping occurred in specific flow regions, not linked with the partition int...

Hello,

Have you tried to define the turbulence model inside the cs_user_parameters.c?
It should be enough to make it work.
I have done it in the past, with v7.

Best regards,
Daniele

Hello, I allow myself to jump inside this topic. I have faced the clipping bahavior of EBRSM with CS for some configurations. I guess what you call clipping here is the fact that the stresses are clipped to very low values, to prevent zero or negative values? Could you share further details about th...

Hello Yvan.

Thank you for your precious and accurate help, as usual.
That answers perfectly my question.

Best regards,
Daniele

Hello, I am wondering about the interpretation of the head loss coefficient in code_Saturne. The "Head losses" panel in the GUI says: "Head losses coefficients: ... = -0.5*rho*alpha_ij*|U|*U_j" Which would indicate that only the "alpha" term must be specified by the use...

Hello, I would like to use a mesh deformed by a previous simulation, as input for a new one. However, I cannot manage to get the mesh_output file (at the end of the deformable mesh simulation) created inside the checkpoint directory. I have ticked "Save mesh if modified by preprocessing" (...

Hello, I would like to use a mesh deformed by a previous simulation, as input for a new one. However, I cannot manage to get the mesh_output file (at the end of the deformable mesh simulation) created inside the checkpoint directory. I have ticked "Save mesh if modified by preprocessing" (...

Hello,

Sorry I missed your post.
My personal way of using cs_user_scripts.py to restart a calculation, is just to add:
domain.restart_input = 'RESU/"case_name"/checkpoint'.
Leaving all the other lines "None".

Let me know if it works.
Best regards,
Daniele

Hello, If it can help, my personal way of running "non LES" setups with second-order time scheme for the momentum equations, is to force the second order for the velocity inside the varpos routine, while keeping first order for the turbulence equations. It seems similar to what you do. But...