[Lang]

Hi everyone,
I'm running a multi-region case in OpenFOAM using multi-world coupling to simulate a specialized casting process for a science project. My setup includes:

• A custom solver for the physics of continuous metal casting.
• laplacianFoam for the temperature field inside the mold.

I use setFields to:

• Initialize the diffusivity field (DT) in the mold (to model different solid materials).
• Properly initialize the casting process.

Issue:

When executing setFields and running both regions as a multi-world case, the initialized fields do not persist. So on t=0 the fields are not initialized as I specified. However, everything works as expected when running the regions separately. I'm unsure what I might be overlooking.


Has anyone encountered a similar issue before or found a better approach to initializing fields in multi-world cases? Any insights would be greatly appreciated!
I've attached my case files and log files for reference. Notably, log.setFieldsMould.txt indicates that the first selection is empty. This also happens without coupling, and I haven't been able to determine the cause. I suspect it's something simple, but it may not be related to the main issue.
Multi-World Documentation:

• v2012: https://www.openfoam.com/node/249#parallel-multi-world
• v2106: https://www.openfoam.com/node/367#local-world-ami

I set up the case by copying the tutorial:
/usr/lib/openfoam/openfoam2312/tutorials/basic/laplacianFoam/multiWorld1


Thanks in advance!

[Lang]

In the top-level Allrun.pre script, restore0Dir is called after executing the bottom-level Allrun.pre script. This overwrites the setFields results.

  0 #!/bin/sh
  1 cd "${0%/*}" || exit                                # Run from this directory
  2 . ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions        # Tutorial run functions
  3 #------------------------------------------------------------------------------
  4 
  5 # Create meshes and initial fields
  6 for subcase in $(./list-worlds)
  7 do
  8 (
  9     cd "$subcase" || exit
 10     echo "case=$subcase"
 11     if [ -x ./Allrun.pre ]
 12     then
 13         ./Allrun.pre
 14     else
 15         runApplication blockMesh
 16     fi
 17 #    restore0Dir
 18     echo
 19 )
 20 done
 21 
 22 #------------------------------------------------------------------------------

Just in case anyone runs into the same issue when copying the tutorial files.