code_saturne User's Forum

Dear Luciano, Thank you very much for your help. Actually, looking more in detail to the listing, I found the message "Abort due to the detection of a negative control volume.". Do you know how to visualize negative volumes in Paraview? I cannot manage to do it. Thank you very much in adva...

Hello, I am performing an ALE simulation. The simulation stops after a few iterations (much less than the ones specified), but no error is displayed in the listing nor in the other files. In the listing, after the last iteration, the "Final stage of the calculation" and "End of calcul...

Hello, I am trying to setting up an ALE simulation. I have tried it both through the GUI and through user routines. I have a few questions if someone has time to answer: 1) When I use the GUI, where can I specify the analogous as the "ihistr=1" one sets inside the "usstr1" to hav...

Hello Yvan, Thank you very much for your reply. I am still struggling with correctly creating the periodicity. Actually everything seems to be ok, but looking at the results the periodic boundary behaves as a wall (zero cross velocity). One question: I guess I need to manually remove the periodic bo...

Hello, I would like to create tranlastion periodicity between two parallel boundary faces. I am using the GUI, v5.0.3. Looking at the listing, the creation of the periodic "interior" boundary seems successful, since it states: Global number of boundary faces selected for joining: 79656 Ele...

Hello, I looked for the posts on this subject, but could not find a precise answer: what is the actual meaning of the "derive" residual and how is it calculated? Is it the lhs minus rhs of the equation? More exactly max(lhs - rhs) among all cells? I have a converged calculation, with deriv...

Thank you Yvan!

I see that the gradient_s routine requires a lot of arguments, and I am not sure to understand them completely...
We can maybe discuss more in detail at the User Meeting...

Best regards,

Daniele

Dear Yvan, Thank you very much! Nevertheless, I still have a problem in my set-up, since I get the following error in the listing: Field "term_grad" with type flag 17 has no value associated with key 37 ("var_cal_opt"). The "use optcal" is present at the begin of the su...

Hello, I would like to add a source term (to a user defined scalar) being the gradient of a given quantity. In the cs_user_source_terms.f90, I wrote: allocate(grad(3,ncelet)) allocate(wtest(ncel)) allocate(term(ncel)) do iel = 1, ncel wtest(iel) = 0.1d0 term(iel) = cpro_crom(iel)*wtest(iel) enddo ca...

Dear all, I am still stuck with drift velocity definition for scalars. I activated all the required flags in the cs_user_parameters.f90. The drift velocity vector is available in the post treatment variables, which confirms that drift has been activated. Nevertheless, how do I specifiy the drift vel...