Adding feature to output individual electrode expansion

[sravanpannala]

Description

The model will output positive and and negative electrode thickness in addition to the overall cell thickness it currently outputs.

Motivation

Currently, the mechanical model outputs only the overall cell thickness. In many cases, especially while studying degradation, it is useful to observe and analyze individual electrode thicknesses i.e. positive and negative electrode thickness.

Possible Implementation

In the _get_mechanical_results(self, variables) function of base_mechanics.py we can add additional code so that we can get individual electrode thicknesses. I've already tried out the implementation and it is very simple.

        if self.domain+" electrode thickness change [m]" not in variables:
            electrode_thickness_change = 0
        else:
            electrode_thickness_change = variables[self.domain+" electrode thickness change [m]"]
        electrode_thickness_change += self.param.n_electrodes_parallel * v_change * L0
return {
            self.domain+" electrode thickness change [m]": electrode_thickness_change,
        }

Additional context

No response

[valentinsulzer]

How's this going @sravanpannala ?

[valentinsulzer]

@mbonkile is also interested in this feature

[sravanpannala]

I'll try to work on it this weekend. Just for confirmation, I've to implement this on a fresh fork, right? And then run all the unit tests?

[rtimms]

@sravanpannala any update on this? Yes, implement on your own fork and then make a PR.