code_saturne User's Forum

Thanks Martin,

Now I can clearly see then that by adding the implicit term, a term with is introduced which cancels out the explicit term.
Thanks for the explanation.

Hi all, I'm thoroughly analyzing the implementation of hybrid turbulence models, specifically regarding RANS and the k-omega SST model. I'm working with version 8.1. While examining the code in cs_turbulence_kw.c , I've come across something that doesn't quite add up regarding the explicit/implicit ...

Hi Yvan, I've been conducting tests with the 2D turbulent flat plate case, which, as mentioned, provides satisfactory results compared to experimental data using the same setup as for the vehicle (same reference magnitudes, same DDES turbulence model, etc.). I notice that the hybrid_blending_functio...

Hi Yvan, I managed to solve the issue. Just as you suggested, I delved into investigating the changes made by the cluster administrators. We found that due to a memory restriction implemented on the master node, the amount of available memory was lower than what I typically have. This raised the pos...

Still conducting tests, but in the meantime, I wanted to highlight something quite peculiar I've noticed: another run halted at the one-quarter mark of the total iterations. Once again, there's no code specifying any particular action at that moment. Again, a .lock file is generated inside the check...

Hi Yvan, In my case, the version is 8.0.1, not 8.1; nevertheless, I shouldn't have the race condition issue in either version, should I? This issue has occurred four times already (I'm simulating external flow around a vehicle, and since the first time it happened, no subsequent simulation has gone ...

Hi Yvan,

I am using version 8.0.1-patch. I have attached the file code_saturne_build.cfg. Additionally, when running a simulation, I have to use this command:

Hi Yvan, I'm running this on nodes of an HPC cluster. I typically use between 3 to 6 nodes, each with 32 cores. Specifically: Intel Xeon Gold 6226R - 2 CPU X 16 cores | 192 GB RAM | Infiniband Network. More information can be found https://cimec.org.ar/c3/pirayu/ . Here's an example: MPI ranks: 192 ...

Hello, I'm experiencing an issue where the simulations stop exactly halfway through the total number of iterations, without having set anything regarding this. It simply ceases to progress, with no error log. The only strange thing I notice is the following: [finzeo@pirayu checkpoint]$ ll total 3139...

Thank you Yvan. Update: I tried using igrhok=1 ; this increased the overall friction drag, but locally at the measurement points, the error remains around 30% . I'm puzzled about what to make of this. Another thing I tried is separately calculating the pressure drag (using cs_post_b_pressure) and th...