Search found 44 matches

by lzhang
Tue Mar 26, 2019 1:00 pm
Forum: code_saturne usage
Topic: choice of nterup and dtref
Replies: 10
Views: 5629

Re: choice of nterup and dtref

Hello Yvan,

Thank you for your information, I am looking forward to your test results.

Best regards,
Lei
by lzhang
Wed Feb 27, 2019 3:29 pm
Forum: code_saturne usage
Topic: use of linear solver in cs_user_solver
Replies: 1
Views: 1370

use of linear solver in cs_user_solver

Hello, I am trying to adapt the example "cs_user_solver-heat-equation.c" for my own application. However for my application, an implicit scheme requiring a linear solver is used. I would like to know how I could define and assemble a matrix, and then use a linear solver to resolve it, plea...
by lzhang
Wed Feb 27, 2019 2:35 pm
Forum: Installation issues
Topic: parallel computing using sgi-mpt
Replies: 15
Views: 11971

Re: parallel computing using sgi-mpt

Hello, Thank you very much for your response! I have tried to reinstall Code_Saturne using intel-mpi for MPI, it works and I can now run a coupled simulation on the cluster. By the way do you have some recommendation for choosing the number of processors for each instance in a coupled simulation, an...
by lzhang
Mon Feb 25, 2019 12:06 pm
Forum: Installation issues
Topic: parallel computing using sgi-mpt
Replies: 15
Views: 11971

Re: parallel computing using sgi-mpt

Hello, Indeed it seems to be a problem with $MPI_RANK variable. I am trying to reinstall Code_Saturne using openmpi option for parallel computing to see if it works. I still have a few questions with regard to your response. In your case, as mpmd_exec.sh does not seem to use the correct environment ...
by lzhang
Sat Feb 23, 2019 4:32 pm
Forum: Installation issues
Topic: parallel computing using sgi-mpt
Replies: 15
Views: 11971

Re: parallel computing using sgi-mpt

Hello, As I mentioned in a previous post, I finally succeeded to launch a single simulation on a cluster using the method presented in https://www.hpc.ntnu.no/display/hpc/Tutorial+for+submitting+parallel+job+to+VILJE+with+Code+Saturne But now I have a problem when trying to apply the same method for...
by lzhang
Mon Jan 21, 2019 11:05 am
Forum: code_saturne usage
Topic: choice of nterup and dtref
Replies: 10
Views: 5629

Re: choice of nterup and dtref

Hello Yvan,

Did you have the time to look at my test case please?

Thanks!

Best regards,
Lei
by lzhang
Thu Jan 03, 2019 4:19 pm
Forum: code_saturne usage
Topic: choice of nterup and dtref
Replies: 10
Views: 5629

Re: choice of nterup and dtref

Hello, Happy new year! I am sorry for the very late response. You can find in the attached .zip file the small test case which involves an oscillating cylinder with an imposed vertical motion (mesh file, .xml files and source file). The .ps file shows a comparison of dimensionless drag force and lif...
by lzhang
Tue Dec 18, 2018 1:59 pm
Forum: code_saturne usage
Topic: choice of nterup and dtref
Replies: 10
Views: 5629

choice of nterup and dtref

Hello, I would like to know how to choose nterup in code_saturne. If I understand well, nterup=1 corresponds to the simplec algorithm, and nterup>1 corresponds to the piso algorithm? I am using code_saturne 5.0.9 to simulate flow around a circular cylinder in order to determine the fluid force appli...
by lzhang
Thu Sep 27, 2018 2:19 pm
Forum: code_saturne usage
Topic: problem using a 3D extruded mesh with periodic boundary condition
Replies: 6
Views: 3535

Re: problem using a 3D extruded mesh with periodic boundary condition

Hello,

Indeed it was a problem with the translation vector.

All works now!

Thanks a lot!

Best regards,
Lei
by lzhang
Thu Sep 27, 2018 10:28 am
Forum: code_saturne usage
Topic: problem using a 3D extruded mesh with periodic boundary condition
Replies: 6
Views: 3535

Re: problem using a 3D extruded mesh with periodic boundary condition

Hello,

I just tested the 5.0.9 version, and I encountered the same error.

Certainly, it is due to the BC boundary condition. Do you have any ideas to solve it, please?

Best regards,
Lei