Reply To: GPU_OpenMPI usage questions
It seems as if OpenMPI is not compiled as CUDA-aware (the default in Ubuntu and most other distros). You can check out a new report on how to set this up at olb-tr7.pdf (including specific mention of WSL GPU setups). I hope this helps! If not I’ll take a closer look.
If all goes to plan we will publish OpenLB 1.6 within this week which will also improve the error messages in this specific situation.