Does OpenFOAM adapter support Lagrangian particle checkpointing?

Mike_Tree · June 5, 2026, 5:51pm

Yes, I’m not sure implicit coupling will actually solve my original problem either, but I figured I’d give it a shot:

github.com/precice/openfoam-adapter

add support for implicit coupling of Lagrangian particles (#405)

develop ← mike-tree-corvid:v1.3.1-lagrangian-particle-implicit

opened 05:50PM - 05 Jun 26 UTC

mike-tree-corvid

+1946 -1

Added checkpointing for Lagrangian particles within the preCICE adaptor. When a …time-rewind is detected the adapter clears the kinematicCloud state from the mesh at the end of the time window and restores the kinematicCloud state from the beginning of the time window to the mesh. However, the preCICE adapter is a function object that operates at the global mesh level and cannot access the protected memory accumulators within OpenFOAM's native InjectionModel that govern if and how many particles are injected. So, in order to completely reset the sim and properly adjust active particle injection an additional library was created. The library, implicitPatchInjection, was created to gain protected access to these variables and override the native prepareForNextTimeStep method allowing for safely wiping the injector's memory and state caches to reset injection. To employ this properly the user will need to load the implicitPatchInjection library in system/controlDict and then swap their injectionModel type to "implicitPatchInjection" in constant/kinematicCloudProperties This addition only supports basicthermoCloud types and patchInjection -> implicitPatchInjection injection types. Other cloud types not supported include: kinematicCloud, reactingCloud, reactingMultiphaseCloud, collidingCloud, MPPICCloud. Other injection models that cannot be replaced with implicitPatchInjection include: coneInjection, solidConeInjection, cellZoneInjection, manualInjection, surfaceFilmInjection, and fieldActivatedInjection. TODO list: - [ ] I updated the documentation in `docs/` - [ ] I added a changelog entry in `changelog-entries/` (create directory if missing)

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Does OpenFOAM adapter support Lagrangian particle checkpointing?

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