Search found 68 matches

by attene
Mon Oct 01, 2018 11:16 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hello Yvan, Thank you for your answer! I will do all the test you suggested. To change from frozen-rotor to transient simulation do I have to impose a sliding wall BC to the blades although a rotational velocity is imposed to the rotating cylindrical domain(in the turbomachinery module)? If this is ...
by attene
Mon Oct 01, 2018 9:25 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hello everybody, In the last test simulation I launched I further reduced the CFL. This time the max CFL looks smaller and below 10 after initialization (please see the listing_0timestep). Even during the first two time steps (listing-calc) it seems ok, but after that goes up and up and the solution...
by attene
Fri Sep 28, 2018 2:44 pm
Forum: code_saturne usage
Topic: lift force calculation
Replies: 16
Views: 8247

Re: lift force calculation

Hi Luciano,


thanks a lot for your answer!
I am using the version 5.0.8 and indeed iwallf was 0 in the setup.log.

Regards,

FA
by attene
Fri Sep 28, 2018 1:36 pm
Forum: code_saturne usage
Topic: lift force calculation
Replies: 16
Views: 8247

Re: lift force calculation

Hi Luciano, Thanks for your help ! Quick question you might answer: Is the option "no wall function" still available when using SST kw model ? I can't choose it when using the GUI. I didn't try without. Best regard Hello, Here you can check the wall function options for the turbulence htt...
by attene
Thu Sep 27, 2018 11:31 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi Yvan, Thank you for your answer! I will have a look at changing all the numerical parameters you mentioned! Meanwhile I have realized something strange in my set-up: Having refined the mesh to solve the boundary layer, I do not need any wall functions in my kw-SST model but although I tried to im...
by attene
Wed Sep 26, 2018 4:09 pm
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi Yvan, I did a test with a constant reference time step (0.0001) as you suggested, the simulation diverged after very few time steps. Please find attached the .xml and listing files. I was thinking now to try changing the numeric scheme under equation parameters.. I am starting to think as well th...
by attene
Wed Sep 26, 2018 10:00 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi Yvan,

Thank you for your precious tips!
I will take them into consideration and update this topic.

Regards,

FA
by attene
Tue Sep 25, 2018 11:05 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi everybody, I would like your opinion regarding the last simulations I have done on my model. you can find attached the two setup.xml I tested as well as the two listing files: 1) steady simulation using the SIMPLEC algorithm. 2)////////////////////////// SIMPLE /////////. Resuming: The computati...
by attene
Tue Sep 25, 2018 11:01 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi everybody, I would like your opinion regarding the last simulations I have done on my model. you can find attached the two setup.xml I tested as well as the two listing files: 1) steady simulation using the SIMPLEC algorithm. 2)////////////////////////// SIMPLE /////////. Resuming: The computati...
by attene
Tue Sep 25, 2018 10:45 am
Forum: code_saturne usage
Topic: Jacobi: error (divergence) solving for Velocity
Replies: 19
Views: 7660

Re: Jacobi: error (divergence) solving for Velocity

Hi everybody, I would like your opinion regarding the last simulations I have done on my model. you can find attached the two setup.xml I tested as well as the two listing files: 1) steady simulation using the SIMPLEC algorithm. 2)////////////////////////// SIMPLE /////////. Resuming: The computatio...