diffsl export

[martinjrobins]

Description

DiffSL is a DSL for specifying ODE (or discretised PDE) models. This issue proposes an export functionality to convert a discretised pybamm model to the DiffSL language: https://martinjrobins.github.io/diffsl/

Motivation

pydiffsol is a wrapper around the rust solver diffsol, initial tests using the SPM model show that this solver is faster than the existing pybamm solvers, so this would be a useful route for users wanting to use diffsol to solve pybamm models quickly

Possible Implementation

export an already discretised pybamm model in the DiffSL language (i.e just write out a string)

Additional context

https://github.com/martinjrobins/diffsol

[gregordecristoforo]

Thanks for the introduction to the implementation of this functionality @martinjrobins. I am planning to work on this issue in the upcoming days and weeks.