code_saturne User's Forum

Hello, Yes, the code should work fine in hybrid MPI/OPenMP mode, and even though in most cases performance is slightly better in pure MPI mode, hybrid mode often requires a bit less memory so can be useful, and may be improved in the future (current work on GPU performance should also improve OpenMP...

Hello, This is still very much work in progress, so performance is still in flux, and we will update some benchmarks soon. Solvers such as simple iterative linear solvers and gradient reconstructions can run faster on a GPU than on a CPU, but we still lose performance over memory transfers due to so...

Hello, I ran your case, and happened on a crash related to CoolProp usage, which was incompatible with an enthalpy-based thermal model. I fixed the issue in the master, v9.0, and v8.0 branches, but do not recommend using a variable viscosity with combustion models, as I am not sure this is handled c...

Hello, This is certainly a mesh quality issue, even though the classical quality "bad cell indicators" seem mostly OK. The fact that computing the wall distance needs disabling the reconstruction (see log) is a giveaway. Some cells might be too "flat" near the boundary. Extruding...

Hello, How many additional time steps did you require ? Note that the number of time steps you specify in the code is by default an absolute number of time steps (same for the physical time), so if you have already reached that number, the restart simply checks values and rebuilds a postprocessing o...

Hello, In the 2nd image, I do not see the 1st 3 lines, containing the install paths, but I see the build dates are not exactly the same (3 minutes difference) in the 2 cases, so I suspect that either : - You have 2 different installs, one with MED support, the other without. - You overwrote the fixe...

Hello, Looking at the code, it seems that it is only possible to define multiple temperatures for premixed flames (Libby-Williams and EBU). For 3-point chemistry, the hinfue value is global to the model (which seems to be an unnecessary limitation, probably due to the initial coding rather that a re...

Hello, In this case, I would recommend either of 2 options : - Apply a revert of that patch on the sources for your build - Or use the gfortran Fortran compiler instead of the Intel compiler (that should be compatible with the Intel C/C++ compilers). Since very little Fortran code is left, performan...

Hello, No, to my knowledge, we have not observed this on our machines. Which version of the Intel compilers do you use (on our side, We mainly use the 2022.2 LLVM-based compilers on one cluster, and the (much) older 18.1 on another machine. I also tested with 24.1 on my local workstation. The PBS as...

Hello,

I think a colleague had plans for "summation by zone" of selected variables, which would fit here, so yes, there are plans for this in the GUI, though I have no idea on where this sits on the priority list.

Best regards,

Yvan