amrex-gridgen-test

• inputs.buf3 gives a set of AMR grids that respect the desired tagging: R < 16 kpc and |z| < 4 kpc.
• inputs.buf0 has too small of a refined volume.

make -j
./main3d.gnu.ex input.buf0
./main3d.gnu.ex input.buf3
python3 plot_grids.py buf0.grids --inputs input.buf0 --output buf0.png --units kpc
python3 plot_grids.py buf3.grids --inputs input.buf3 --output buf3.png --units kpc

Runtime debugging/tuning:

• amr.dynamic_grid_iterations = 1 enables the dynamic convergence loop (cycle detection + 50-iteration fail-safe). Default is the original fixed 4-iteration path for backward compatibility.
• amr.debug_grid_iterations = 1 prints the iteration count and the reason the iteration loop stopped.

The problem is caused by this line: https://github.com/AMReX-Codes/amrex/blob/8ae62c47e1d6660cb1a3926b9c2de4795b3d3c13/Src/AmrCore/AMReX_AmrMesh.cpp#L1013