code_saturne User's Forum

Here are the thermal Flux and Boundary_temperature at boundaries.

1. Why are these quantities given on the volumic mesh and not only at the boundary faces?
2. The input thermal flux is globally negative. Does it mean the heat is going from the fluid to the solid?
3. The heat exchange is not ...

Hello,

I am quite confused by the coupled Syrthes/Saturne result I get. I have a heating solid bar centered within a fluid domain. The solid bar is heated by Joule effect which I temporarily model by a handmade heating field.

What I am interested in is the thermal transfer between the solid bar ...

All right! I have been able to run the simulation by rearranging the <conjugate_heat_transfer> as:

<conjugate_heat_transfer>
<external_coupling>
<projection_axis>Z</projection_axis>
<syrthes_instances>
<instance name="SOLID">
<coupled_boundary label="Barre1_P1"/>
</instance>
</syrthes ...

Hi Yvan,
Thank you for your answer.
In my setup.xml Saturne's config file, I have the following section :

<conjugate_heat_transfer>
<external_coupling>
<syrthes>
<projection_axis>Z</projection_axis>
<selection_criteria>1</selection_criteria>
<syrthes_name>SYRTHES</syrthes_name>
<verbosity ...

Hi,
Now that I have been successfully able to run the Syrthes' coupling tutorial 3_DISKS, I have tried to report the procedure to my own test case. Both simulation (Syrthes and Saturne) work independently.
However, once I try to run the coupled simulation, the Syrthes process crashes with the ...

Thanks Yvan, that was exactly the problem !

Maybe all this should be added to the 3_2D_DISKS step-by-step document in a prerequisite sub-section of the introduction :

### Prerequisite

* Saturne 8.0.x compiled with mpi support :
```bash
/configure –prefix=path/to/install/dir --with-mpi ...

Hi Yvan,

Thank you very much for your quick answer!

I have been looking at the compilation logs of Saturne and Syrthes and both seem to use /usr/bin/mpicc for the mpi part.

Then I noticed that Syrthes compiles two separate libraries : the 'seq' and the 'mpi' one. I suddenly remembered that ...

Hi there!
I am trying to run the CS/Syrthes coupled test case 3_2D_DISKS_2.
Each simulation works separately as expected : code_saturne 8.0.4, Syrthes5.0.
However, when running the coupled simulation, I get the following MPI Error :

mpiexec has exited due to process rank 1 with PID 0 on
node ...

Thanks Yvan, it worked as a charm! :thumb:

Hi,
I am starting a new project using Code_Saturne and I first wish to upgrade for v7.1 to v8.0.
Unfortunately, I have a user defined function cs_user_radiative_transfer_bcs which used to have the following signature :

void cs_user_radiative_transfer_bcs ( int nvar,
const int bc_type[],
int ...