Search found 45 matches

by Erwan Le Coupanec
Sun Sep 06, 2020 10:00 pm
Forum: code_saturne usage
Topic: Incorrect value for convective outlet boundary condition coefficients in condli.f90
Replies: 2
Views: 2560

Re: Incorrect value for convective outlet boundary condition coefficients in condli.f90

Hello,

Many thanks for the bug report. It is now fixed on master, 6.2, 6.1, 6.0 and 5.0 branches.

Best regards,
Erwan
by Erwan Le Coupanec
Sun May 03, 2020 11:18 am
Forum: code_saturne usage
Topic: How can I modify the equation for electric potential?
Replies: 14
Views: 9407

Re: How can I modify the equation for electric potential?

Hello Rodion, Thank you for the description. Looking at the model, my first remark is that unlike the model described in this old thread https://www.code-saturne.org/forum/viewtopic.php?f=4&t=1917 that you mentioned, the added term does not write as: div( phi C u_r ) with u_r a vector, and C a g...
by Erwan Le Coupanec
Mon Apr 20, 2020 12:13 pm
Forum: code_saturne usage
Topic: How can I modify the equation for electric potential?
Replies: 14
Views: 9407

Re: How can I modify the equation for electric potential?

Hello,

To be able to give more adapted advices:
can you give some description of how this vector A is computed ?
what does this term stand for, or what phenomena is it modeling ?

Thanks,
Erwan
by Erwan Le Coupanec
Tue Mar 03, 2020 11:35 am
Forum: code_saturne usage
Topic: how to turn on the low-Mach approximation?
Replies: 2
Views: 2447

Re: how to turn on the low-Mach approximation?

Hello Daniele, Through the GUI, you're correct you have to select the standard (incompressible) model. Then in 6.0, you've got the possibility to enable a Boussinesq approach by setting in cs_user_parameters.c, idilat=0 (dans la structure stokes_model, voir exemple dans doc Doxygen); then you fill i...
by Erwan Le Coupanec
Fri Nov 01, 2019 6:52 pm
Forum: code_saturne usage
Topic: "Preprocessing stage required but no mesh is given"
Replies: 41
Views: 16722

Re: "Preprocessing stage required but no mesh is given"

Hello,

Apparently, hdf5 was found by configure.
Could you please post the preprocessor.log you mentioned in an earlier post ?

Cheers,
Erwan
by Erwan Le Coupanec
Wed Oct 30, 2019 11:19 am
Forum: code_saturne usage
Topic: CS ver 6.0 - Homogeneus Eulerian - VoF model: Fluid properties varying with temperature
Replies: 5
Views: 3497

Re: CS ver 6.0 - Homogeneus Eulerian - VoF model: Fluid properties varying with temperature

Hello Alessandro, Sorry for the late answer. In the VoF model, as implemented in CS, the assumption that density varies linearly with the void fraction is used to derive the void fraction equation from mass balance and mass balance itself is solved under its incompressible form i.e.: div( \vect{u} )...
by Erwan Le Coupanec
Tue Apr 09, 2019 11:40 am
Forum: code_saturne usage
Topic: Wind tunnel by Launder-Sharma k-epsilon
Replies: 4
Views: 13168

Re: Wind tunnel by Launder-Sharma k-epsilon

Hi Konstantin, Launder-Sharma is a low Reynolds turbulence model, so using it to take into account rough walls with a wall model does not make much sense. Nonetheless since the title of your thread calls for a more generic answer that might be needed by other users as well, you can find a user examp...
by Erwan Le Coupanec
Mon Jul 16, 2018 3:06 pm
Forum: code_saturne usage
Topic: Gradient Code_saturne vs Paraview
Replies: 10
Views: 6481

Re: Gradient Code_saturne vs Paraview

Hi,

you can take a look at section 2.1.4 of the theory guide for the definition of the solved pressure p*.

Hoping you'll find useful elements there,

Regards,
Erwan.
by Erwan Le Coupanec
Mon Jul 09, 2018 1:35 pm
Forum: code_saturne usage
Topic: Compressible module and internal coupling
Replies: 7
Views: 4125

Re: Compressible module and internal coupling

Nice geometry by the way !
by Erwan Le Coupanec
Mon Jul 09, 2018 1:34 pm
Forum: code_saturne usage
Topic: Compressible module and internal coupling
Replies: 7
Views: 4125

Re: Compressible module and internal coupling

Hello, The exchange coefficient is computed using a harmonic mean of a left and right diffusion coefficient. On fluid side, the coefficient is seeing the turbulent wall model. Is the second test case (square) laminar ? Could you send me this test case as you set it ? It's hard to answer your second ...