OpenBC FFT Solver: Fix a 2d mode bug. #4671
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This bug only affected 3D WarpX/ImpactX when there was only one cell in the z-direction for the solver. The fix is that we have simplified the logic for handling domain decomposition. If it's in the 2D mode in 3D, we simply do slab decomposition.
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EZoni
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Sep 23, 2025
Mainly to pull in AMReX-Codes/amrex#4671 Also updates pybind11 to [v3.0.1](https://github.com/pybind/pybind11/releases/tag/v3.0.1), to stay in sync with [pyAMReX](AMReX-Codes/pyamrex#481). <hr> Weekly update to latest AMReX. Weekly update to latest pyAMReX. Weekly update to latest PICSAR (no changes). ```console ./Tools/Release/update_dependencies.py --amrex ./Tools/Release/update_dependencies.py --pyamrex ./Tools/Release/update_dependencies.py --picsar ``` This pull request was created with the script `./Tools/Release/weeklyUpdate.py`, following the instructions described in https://warpx.readthedocs.io/en/latest/maintenance/release.html#update-warpx-core-dependencies. --------- Signed-off-by: Axel Huebl <[email protected]>
WeiqunZhang
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PR AMReX-Codes#4671 did not fix all the issues with the 2d mode OpenBC FFT solver in 3D WarpX/ImpactX runs. The scaling was still wrong.
ax3l
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PR #4671 did not fix all the issues with the 2d mode OpenBC FFT solver in 3D WarpX/ImpactX runs. The scaling was still wrong.
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This bug only affected 3D WarpX/ImpactX when there was only one cell in the z-direction for the solver.
The fix is that we have simplified the logic for handling domain decomposition. If it's in the 2D mode in 3D, we simply do slab decomposition.