code_saturne User's Forum

Hello Yvan,

thank you very much. It worked. I`ve another question, too. I would like to compute shear rate and shear stress in code_saturne. Therefore, i used the attached subroutines. I want to compute them for the whole boundary as well as certain curved faces, which I defined in output control ...

Hi,

yes, you understood it right. This is what I want to do. Iḿ using EnSight, so such a script would be nice. I do not understand it yet. Could you explain it a bit more in detail what I would have to do??

Thanks,

Sebastian

Hello Yvan,

I´d like to ask you an general question about checkpoints. I`m using checkpoints on a Blue Gene/Q system with help of cs_user_scripts.py. Is it possible to "fuse" the results to one (e.g. in ParaView)?

Best regards,

Sebastian

Hello Yvan,

I could find the problem. It was again the shaft But now the courant number is good. So, your algorithm seems to be ok.

Thank you and best regards,

Sebastian

Hello Yvan,

i did not anwsered yet because I optimized the mesh and wanted to do a test first. The shaft region was meshed very very fine compared to the rest. I fixed it making it a bit coarser. Up to 14 time steps the courant seems to be constant low. But beginning with the 15th time step it is ...

Hi Yvan,

you are right. I postprocessed the courant numbner and the interface in the region of the shaft seems to be the problem. I have to fix it changing the mesh in this region.

Thanks a lot!

Sebastian

Hello Yvan,

how are you? As you know I had certain problems with the blood pump with respect to mesh joining. To fix the problems I meshed the interface region quadrangular to make it more regualar. Attached you can find a picture. The result is that I do not have to increase the fraction anymore ...

Hello Yvan,

one question, please. Can i adjust the y+ with help of the roughness height for rough walls in the GUI? I am still not able to create a viscous layer. It does not work. Don't know why.

Best regards,

Sebastian

Hello Yvan,

in the BPG i could read that the y+ distance should be >20 for high Reynolds models. One opportunity would be to create an additional outer cell layer with a width of 0,1 x hydraulic diameter. What do you think about this?

I already searched in the internet but could not find ...

Hello Yvan,

just something for your information and related to my questions about the relation between fraction and computed variables. I ran another computation with a fraction of 0.15 and a plane of 25. It crached after 60 time steps. But nevertheless i could compare the first 60 time steps with ...