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feat(rust): an in-process diffsol DAE solver in pybamm-core #5964

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feat(rust): an in-process diffsol DAE solver in pybamm-core #5964

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -23,6 +23,7 @@
- pybammsolvers gains an IDAKLU backend that evaluates a Rust `CompiledModel` through its C ABI, resolved at runtime so IDAKLU still loads without the Rust extension, with a Rust-backed Newton solver and output sensitivities projected natively in-solver. ([#5961](https://github.com/pybamm-team/PyBaMM/pull/5961))
- `IDAKLUSolver` solves `convert_to_format = "rust"` models through a Rust `CompiledModel`, one evaluator per thread, so `num_threads` parallelises input sets. `output_variables` support sensitivities and time integrals, and `NonlinearSolver` compiles its own model. ([#5962](https://github.com/pybamm-team/PyBaMM/pull/5962))
- `IDAKLUSolver` observes rust-model solutions natively: variables and their sensitivities are evaluated on tapes compiled into the solve's Rust graph, with no CasADi function, and `Solution.update([...])` compiles a set of variables into one tape per segment. ([#5963](https://github.com/pybamm-team/PyBaMM/pull/5963))
- `pybamm-core` gains an in-process DAE solver built on diffsol's BDF, with forward sensitivities under error control, batched one lane per parameter, and a rayon batch layer for input-set sweeps. ([#5964](https://github.com/pybamm-team/PyBaMM/pull/5964))

## Bug fixes

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