# Latest **URL:** https://code-saturne.org/forum/latest.md [Latest](https://code-saturne.org/forum/latest.md) · [Categories](https://code-saturne.org/forum/categories.md) · [Tags](https://code-saturne.org/forum/tags.md) --- ## [PDF manuals for download?](https://code-saturne.org/forum/t/pdf-manuals-for-download/3086)
**Author:** [@tpa](https://code-saturne.org/forum/u/tpa)\ **Replies:** 2\ **Last updated:** [November 2, 2026, 4:21pm UTC](https://code-saturne.org/forum/t/pdf-manuals-for-download/3086 "2026-11-02T16:21:41Z")
Hi, I just built ver. 9.3-alpha but install\_saturne.py doesn’t build the pdf manuals. Is it possible to download the manuals from somewhere ? --- ## [LES stability issue on a polyhedral mesh](https://code-saturne.org/forum/t/les-stability-issue-on-a-polyhedral-mesh/3083)
**Author:** [@cast\_nic](https://code-saturne.org/forum/u/cast_nic)\ **Replies:** 3\ **Last updated:** [October 30, 2026, 10:25am UTC](https://code-saturne.org/forum/t/les-stability-issue-on-a-polyhedral-mesh/3083 "2026-10-30T10:25:40Z")
Title: LES stability issue on a polyhedral mesh Hello, I am running a wall-resolved LES of a 1x1 rod-bundle subchannel with a spacer grid in code\_saturne 9.0.0. On one mesh the computation hits a runaway after about 24… --- ## [Gradient limiter v9](https://code-saturne.org/forum/t/gradient-limiter-v9/3082)
**Author:** [@daniele](https://code-saturne.org/forum/u/daniele)\ **Replies:** 3\ **Last updated:** [October 27, 2026, 11:04am UTC](https://code-saturne.org/forum/t/gradient-limiter-v9/3082 "2026-10-27T11:04:00Z")
Hello, I have noticed that gradient limiters can be set by the user in the GUI in v9. However, I am a bit confused on what the “limiter factor” represents exactly. The keyword “cmligr” does not seem to exist in v9 docu… --- ## [MPI\_ERR\_TRUNCATE during halo construction after periodic joining (v9.0.0)](https://code-saturne.org/forum/t/mpi-err-truncate-during-halo-construction-after-periodic-joining-v9-0-0/3079)
**Author:** [@cast\_nic](https://code-saturne.org/forum/u/cast_nic)\ **Replies:** 2\ **Last updated:** [September 8, 2026, 7:06am UTC](https://code-saturne.org/forum/t/mpi-err-truncate-during-halo-construction-after-periodic-joining-v9-0-0/3079 "2026-09-08T07:06:50Z")
Hello, I am running a periodic channel case with code\_saturne 9.0.0 and the preprocessing stage aborts with an MPI error immediately after the joining operation. Attachments are restricted to images on this forum, so I … --- ## [A collection of code\_saturne tutorials](https://code-saturne.org/forum/t/a-collection-of-code-saturne-tutorials/3077)
**Author:** [@florian-simvia](https://code-saturne.org/forum/u/florian-simvia)\ **Replies:** 0\ **Last updated:** [August 25, 2026, 8:44am UTC](https://code-saturne.org/forum/t/a-collection-of-code-saturne-tutorials/3077 "2026-08-25T08:44:04Z")
Hello everyone, Simvia has been putting together a set of small code\_saturne tutorials, and they are now online: tutorials-code\_saturne Each one is a case you can download and run as it is, with a README that expla… --- ## [Turbomachinery tutorial files](https://code-saturne.org/forum/t/turbomachinery-tutorial-files/2475)
**Author:** [@CAVT](https://code-saturne.org/forum/u/CAVT)\ **Replies:** 1\ **Last updated:** [August 25, 2026, 7:16am UTC](https://code-saturne.org/forum/t/turbomachinery-tutorial-files/2475 "2026-08-25T07:16:47Z")
Hello, everyone. I’m trying to learn the turbomachinery module, and I’ve come accross a Youtube tutorial (https://www.youtube.com/watch?v=ZxQLzzqCLnc) in the official channel. The tutorial mentions that there’s a complem… --- ## [Code Saturne & Code Aster](https://code-saturne.org/forum/t/code-saturne-code-aster/3066)
**Author:** [@dimitri014](https://code-saturne.org/forum/u/dimitri014)\ **Replies:** 1\ **Last updated:** [July 21, 2026, 7:06pm UTC](https://code-saturne.org/forum/t/code-saturne-code-aster/3066 "2026-07-21T19:06:07Z")
Hi, I have just completed an explicit FSI coupling framework between Code\_Saturne and Code\_Aster. It runs in a SLURM environment and is available at: The implementation is already quite functional. However, as with a… --- ## [Poor cylinder wake results on unstructured meshes in Code\_Saturne 9.1](https://code-saturne.org/forum/t/poor-cylinder-wake-results-on-unstructured-meshes-in-code-saturne-9-1/2496)
**Author:** [@wayne\_cai](https://code-saturne.org/forum/u/wayne_cai)\ **Replies:** 2\ **Last updated:** [July 10, 2026, 2:29pm UTC](https://code-saturne.org/forum/t/poor-cylinder-wake-results-on-unstructured-meshes-in-code-saturne-9-1/2496 "2026-07-10T14:29:30Z")
Hello, We are testing the flow around cylinder case with Code\_Saturne 9.1. With structured meshes, the case works correctly in Code\_Saturne 9.1. However, with unstructured meshes, we could not obtain reasonable results… --- ## [Questions about convection schemes](https://code-saturne.org/forum/t/questions-about-convection-schemes/2498)
**Author:** [@PFERRO](https://code-saturne.org/forum/u/PFERRO)\ **Replies:** 2\ **Last updated:** [June 22, 2026, 10:04pm UTC](https://code-saturne.org/forum/t/questions-about-convection-schemes/2498 "2026-06-22T22:04:07Z")
Dear Yvan, What is the difference between the SOLU centered gradient and SOLU upwind gradient ? To my knowledge (from how it’s done under OpenFOAM) : we add to the implicit upwind scheme an explicit correction to the… --- ## [Phase averaging for unsteady cases](https://code-saturne.org/forum/t/phase-averaging-for-unsteady-cases/2497)
**Author:** [@C.FLAG](https://code-saturne.org/forum/u/C.FLAG)\ **Replies:** 2\ **Last updated:** [June 18, 2026, 5:11am UTC](https://code-saturne.org/forum/t/phase-averaging-for-unsteady-cases/2497 "2026-06-18T05:11:59Z")
Hello, I am currently working on LES of an unsteady case with harmonic forcing. I am collecting time-averaged statistics for various quantities. Is there a way to collect phase-averaged statistics using cs\_time\_moment\_d… --- ## [A small printing bug in setup.log for the VOF interface compression parameters](https://code-saturne.org/forum/t/a-small-printing-bug-in-setup-log-for-the-vof-interface-compression-parameters/2495)
**Author:** [@WenhaoZHANG](https://code-saturne.org/forum/u/WenhaoZHANG)\ **Replies:** 1\ **Last updated:** [June 3, 2026, 5:05pm UTC](https://code-saturne.org/forum/t/a-small-printing-bug-in-setup-log-for-the-vof-interface-compression-parameters/2495 "2026-06-03T17:05:21Z")
Bonjour, I found a small printing bug in setup.log for the VOF interface compression parameters: the values of kdrift and cdrift are printed in reverse order. In cs\_vof.cpp, cs\_log\_printf (CS\_LOG\_SETUP, \_(“\\n” " F… --- ## [Code\_Saturne FMU Export: User Feedback and Developer Insights](https://code-saturne.org/forum/t/code-saturne-fmu-export-user-feedback-and-developer-insights/2494)
**Author:** [@Mafe](https://code-saturne.org/forum/u/Mafe)\ **Replies:** 0\ **Last updated:** [May 26, 2026, 9:30am UTC](https://code-saturne.org/forum/t/code-saturne-fmu-export-user-feedback-and-developer-insights/2494 "2026-05-26T09:30:18Z")
Code\_Saturne FMU Export: User Feedback and Developer Insights This thread summarizes a recent email exchange between Félix Marsollier (SIL3X) and Yvan Fournier (EDF, Code\_Saturne support team) regarding the FMU (Functio… --- ## [Non-physical pressure difference in an annular porous media zone (Pipe Flow)](https://code-saturne.org/forum/t/non-physical-pressure-difference-in-an-annular-porous-media-zone-pipe-flow/2493)
**Author:** [@www233](https://code-saturne.org/forum/u/www233)\ **Replies:** 4\ **Last updated:** [May 14, 2026, 7:28am UTC](https://code-saturne.org/forum/t/non-physical-pressure-difference-in-an-annular-porous-media-zone-pipe-flow/2493 "2026-05-14T07:28:20Z")
Hi everyone, I am currently simulating flow through a circular pipe where an annular porous zone is implemented along the interior wall. I have defined the physical properties of the porous region using the following f… --- ## [How to properly use LTS](https://code-saturne.org/forum/t/how-to-properly-use-lts/2489)
**Author:** [@PFERRO](https://code-saturne.org/forum/u/PFERRO)\ **Replies:** 8\ **Last updated:** [April 30, 2026, 7:44am UTC](https://code-saturne.org/forum/t/how-to-properly-use-lts/2489 "2026-04-30T07:44:57Z")
Dear Forum, We are facing issues with the local time stepping for buoyancy driven flow (and conjugate heat transfer). From our understanding the local time step would be calculated as follow : dtCFL = max( min(CFL\*dX/… --- ## [Poisson equation solution using Code\_Saturne solver](https://code-saturne.org/forum/t/poisson-equation-solution-using-code-saturne-solver/2491)
**Author:** [@Nicolas](https://code-saturne.org/forum/u/Nicolas)\ **Replies:** 2\ **Last updated:** [April 30, 2026, 7:10am UTC](https://code-saturne.org/forum/t/poisson-equation-solution-using-code-saturne-solver/2491 "2026-04-30T07:10:57Z")
Good morning, I am currently trying to solve a Poisson equation based on a scalar field that I define beforehand within NEPTUNE\_CFD. My approach is to reuse the Poisson solver that is originally used for the pressure f… --- ## [code\_saturne automation](https://code-saturne.org/forum/t/code-saturne-automation/2492)
**Author:** [@florian-simvia](https://code-saturne.org/forum/u/florian-simvia)\ **Replies:** 0\ **Last updated:** [April 22, 2026, 12:54pm UTC](https://code-saturne.org/forum/t/code-saturne-automation/2492 "2026-04-22T12:54:03Z")
Hello everyone, I would like to share with the community the release of a new tool for code\_saturne automation, called csauto: Presentation : csauto — Automate code\_saturne CFD simulation campaigns Source : GitHub - s… --- ## [Water wheels](https://code-saturne.org/forum/t/water-wheels/2488)
**Author:** [@SIMON\_DELANGE](https://code-saturne.org/forum/u/SIMON_DELANGE)\ **Replies:** 4\ **Last updated:** [April 8, 2026, 7:43pm UTC](https://code-saturne.org/forum/t/water-wheels/2488 "2026-04-08T19:43:41Z")
Hello, I am learning to use “Code Saturne” and I’d like to study/optimize water wheels, do you have any advises to make it work please? Many thanks :wink: --- ## [time step setting routine (former varpos.f90) in v9?](https://code-saturne.org/forum/t/time-step-setting-routine-former-varpos-f90-in-v9/2490)
**Author:** [@daniele](https://code-saturne.org/forum/u/daniele)\ **Replies:** 1\ **Last updated:** [April 7, 2026, 10:31pm UTC](https://code-saturne.org/forum/t/time-step-setting-routine-former-varpos-f90-in-v9/2490 "2026-04-07T22:31:19Z")
Hello, I was used to edit the varpos.f90 routine in v7 for some specific time-step settings. However, this routine is not present anymore in v9. I made a grep of “ischtp” in the src, but could not really understand the … --- ## [process oiur faire remonter un bug dans Syrthes?](https://code-saturne.org/forum/t/process-oiur-faire-remonter-un-bug-dans-syrthes/2487)
**Author:** [@jf\_galtenco](https://code-saturne.org/forum/u/jf_galtenco)\ **Replies:** 3\ **Last updated:** [March 21, 2026, 11:14am UTC](https://code-saturne.org/forum/t/process-oiur-faire-remonter-un-bug-dans-syrthes/2487 "2026-03-21T11:14:15Z")
Bonjour Nous pensons avoir identifie un bug assez technique dans le traitement du radiatif en géométrie 2d axi dans Syrthes 5.0 qui conduit a faire diverger des cas par accumulations d erreurs surestimées qui ne diverge… --- ## [Recommandation for polyhedral cells](https://code-saturne.org/forum/t/recommandation-for-polyhedral-cells/2485)
**Author:** [@PFERRO](https://code-saturne.org/forum/u/PFERRO)\ **Replies:** 2\ **Last updated:** [March 5, 2026, 8:18am UTC](https://code-saturne.org/forum/t/recommandation-for-polyhedral-cells/2485 "2026-03-05T08:18:51Z")
In case of a polyhedral mesh generated by fluent mesher what are the recommendations in term of schemes and linear solver (highly turbulent flow, variable density and CHT) ? The mesh non-orthogonality is less than 70°. … --- ## [\[SATURNE-9.1.0\] Compilation with MEDCoupling 9.15.0](https://code-saturne.org/forum/t/saturne-9-1-0-compilation-with-medcoupling-9-15-0/2486)
**Author:** [@Goaty](https://code-saturne.org/forum/u/Goaty)\ **Replies:** 1\ **Last updated:** [March 3, 2026, 5:05pm UTC](https://code-saturne.org/forum/t/saturne-9-1-0-compilation-with-medcoupling-9-15-0/2486 "2026-03-03T17:05:44Z")
Hello! :smiley: The users of the cluster I administer need to have version 9.1.0 of Saturn with MEDCoupling. MEDCoupling was not installed long ago, so I am only referring to the following documentation to try to get e… --- ## [CS/Syrthes Coupling](https://code-saturne.org/forum/t/cs-syrthes-coupling/2484)
**Author:** [@AdamLarat](https://code-saturne.org/forum/u/AdamLarat)\ **Replies:** 5\ **Last updated:** [February 19, 2026, 5:22pm UTC](https://code-saturne.org/forum/t/cs-syrthes-coupling/2484 "2026-02-19T17:22:13Z")
Hi there! I am trying to reproduce numerically some experimental results : some metal bars are heated by Joule effect and cooled by surrounding air buoyancy. Thus, I prescribe a heating field within the bars on the Syr… --- ## [Dynamic boundary conditions](https://code-saturne.org/forum/t/dynamic-boundary-conditions/2483)
**Author:** [@fracenvi](https://code-saturne.org/forum/u/fracenvi)\ **Replies:** 1\ **Last updated:** [January 31, 2026, 12:44am UTC](https://code-saturne.org/forum/t/dynamic-boundary-conditions/2483 "2026-01-31T00:44:07Z")
Hello, I’m trying to run a case where i impose a varying boundary condition, as i’m trying to model a system where i have a flactuating velocity at the inlet (specifically, i would like to impose a time-varying boundary… --- ## [Restarting cold flow simulation introducing combustion model](https://code-saturne.org/forum/t/restarting-cold-flow-simulation-introducing-combustion-model/2482)
**Author:** [@fracenvi](https://code-saturne.org/forum/u/fracenvi)\ **Replies:** 1\ **Last updated:** [January 28, 2026, 12:44pm UTC](https://code-saturne.org/forum/t/restarting-cold-flow-simulation-introducing-combustion-model/2482 "2026-01-28T12:44:49Z")
Hello, I’m trying to collect statistics for a simulation case which runs for a very large number of cells and the combustion module on. Henceforth, what i’m doing is running the case first deactivating the combustion t… --- ## [Modify buoyancy-term parameter Pr](https://code-saturne.org/forum/t/modify-buoyancy-term-parameter-pr/2480)
**Author:** [@WenhaoZHANG](https://code-saturne.org/forum/u/WenhaoZHANG)\ **Replies:** 1\ **Last updated:** [January 11, 2026, 7:05pm UTC](https://code-saturne.org/forum/t/modify-buoyancy-term-parameter-pr/2480 "2026-01-11T19:05:31Z")
Bonjour, I am using code\_saturne 9.0 to simulate breaking waves on cronos. I would like to modify the buoyancy-term parameter Pr in order to compare my results with other published papers that use OpenFOAM. Does anyone… --- ## [\[V8.3 GUI\] Unable to change Centering Blend value for Velocity (locked to 1)](https://code-saturne.org/forum/t/v8-3-gui-unable-to-change-centering-blend-value-for-velocity-locked-to-1/2481)
**Author:** [@Xian\_Ge](https://code-saturne.org/forum/u/Xian_Ge)\ **Replies:** 1\ **Last updated:** [January 11, 2026, 6:55pm UTC](https://code-saturne.org/forum/t/v8-3-gui-unable-to-change-centering-blend-value-for-velocity-locked-to-1/2481 "2026-01-11T18:55:36Z")
Hello everyone, I am currently using Code\_Saturne V8.3 to perform an LES simulation with the WALE model. I would like to experiment with different numerical schemes for the velocity field. However, I have encountered a… --- ## [Issue with Infinite SEM Virtual Box Dimensions (coo\_min = -1e30) on Annular Inlet \[V9.1\]](https://code-saturne.org/forum/t/issue-with-infinite-sem-virtual-box-dimensions-coo-min-1e30-on-annular-inlet-v9-1/2479)
**Author:** [@Sun\_Ziyi](https://code-saturne.org/forum/u/Sun_Ziyi)\ **Replies:** 4\ **Last updated:** [January 8, 2026, 10:53pm UTC](https://code-saturne.org/forum/t/issue-with-infinite-sem-virtual-box-dimensions-coo-min-1e30-on-annular-inlet-v9-1/2479 "2026-01-08T22:53:52Z")
Hello Code\_Saturne community, I am currently running an LES simulation (WALE model) of a rotating disk cavity with axial through-flow on a cluster (using MPI). I am trying to impose synthetic turbulence at the inlet usi… --- ## [Running the model on HPC](https://code-saturne.org/forum/t/running-the-model-on-hpc/2478)
**Author:** [@sophie\_Lu](https://code-saturne.org/forum/u/sophie_Lu)\ **Replies:** 3\ **Last updated:** [December 27, 2025, 1:04am UTC](https://code-saturne.org/forum/t/running-the-model-on-hpc/2478 "2025-12-27T01:04:47Z")
Hi all, I am running Code\_Saturne 8.2 coupled with SSH-Aerosol on an HPC system, and I consistently encounter a runtime error at the last time step of the simulation. The case runs normally for most of the simulation, … --- ## [T-Junction CHT Internal Coupling Simulation not working with Fillet](https://code-saturne.org/forum/t/t-junction-cht-internal-coupling-simulation-not-working-with-fillet/2476)
**Author:** [@saintlyknighted](https://code-saturne.org/forum/u/saintlyknighted)\ **Replies:** 4\ **Last updated:** [December 23, 2025, 11:41am UTC](https://code-saturne.org/forum/t/t-junction-cht-internal-coupling-simulation-not-working-with-fillet/2476 "2025-12-23T11:41:03Z")
Hi, I have been trying to set up a CHT internal coupling simulation of a T-Junction in code saturne to measure the temperature gradients in the pipe wall. I have this working in a T-Junction geometry where there is no fi… --- ## [Code\_Saturne and Code\_Aster coupling workflow](https://code-saturne.org/forum/t/code-saturne-and-code-aster-coupling-workflow/2477)
**Author:** [@saintlyknighted](https://code-saturne.org/forum/u/saintlyknighted)\ **Replies:** 1\ **Last updated:** [December 13, 2025, 3:54am UTC](https://code-saturne.org/forum/t/code-saturne-and-code-aster-coupling-workflow/2477 "2025-12-13T03:54:10Z")
Hi, I am trying to take the thermal loads from my Code\_Saturne T\_Junction and using that to get thermal stresses on the T-Junction pipe in Code\_Aster. I have two med results files from Code\_Saturne, which are results\_Bou… [Next page](https://code-saturne.org/forum/latest.md?page=1)