Changelog

v4.0.0 (2026-03-29)

Major release introducing GPU acceleration, a new matrix-free solver, comprehensive architectural refactoring, and expanded tutorials.

Highlights

• CUDA GPU acceleration via openimpala-cuda PyPI package

• TortuosityMLMG solver — matrix-free AMReX geometric multigrid

• Microstructural parameterisation engine — SSA, REV study, PSD, connected components

• Fortran-to-C++ kernel migration — all compute kernels now native C++ AMReX lambdas

• 7-part tutorial series with Google Colab support

See the full release notes on GitHub.

v3.1.0 (2026-03-10)

• Replaced pyamrex dependency with native C++ NumPy ingestion via VoxelImage

• Self-contained PyPI wheels — pip install openimpala with zero compilation

• Memory-safe workflows: ingest data, free Python array, then solve

v3.0.0 — v3.0.2

• Python bindings via pybind11

• CMake build system modernisation

• scikit-build-core + cibuildwheel integration

• Multi-phase transport support

v2.0.0 — v2.1.1

• AMReX upgrade and CI/CD pipeline

• Catch2 test framework integration

• Code coverage with Codecov

• clang-format and clang-tidy enforcement

v1.0.0 — v1.1.1

• Initial public release

• HYPRE-based tortuosity and effective diffusivity solvers

• TIFF, HDF5, RAW, DAT image readers

• Apptainer container builds