export values on corresponding meshes (adaptive mesh refinement)

[maxxxzdn]

Hi John,

I want to use Comsol to generate a lot of solutions of a time-dependent 1D PDE with different initial conditions and adaptive mesh refinement.

Precisely, I want to export each time point of each solution with a corresponding adapted mesh. In Comsol, I can do it "simply" by creating a dataset for each solution and then downloading each time point manually (since meshes are different, I am not able to download all points at once).

The approach obviously doesn't scale, which is a problem as I want to generate many solutions (up to 1k). Furthermore, I am looking for a way to automatize it. Can you please point out on a possible way to do it within the library?

Sincerely,
Maksim

[john-hen]

I am not familiar with your use case, so other than the general advice in #86, I got nothing.

[maxxxzdn]

I think the challenge for me is to take a computed COMSOL solution as .mph file and evaluate it on vertices of a specific mesh at each time point iteratively. I have all the meshes stored within the solution and the array of time points.

something like values[t] = evaluate(model, mesh[t].vertices, t)

[maxxxzdn]

I just figured out that it also works if I export data for a specific time-point instead of all at once (see pic).
So my question practically boils down to whether I can do it automatically in python.

[john-hen]

I'm sure it's possible. You probably just have to figure out what parameters to pass to model.evaluate(). Like what dataset name and inner index. Which depends on how you've set up your model.

If that doesn't work, because of some detail I may be overlooking, then it's still possible to automate that in Python. Simply because you have access to the full Comsol API if need be. (Via MPh and thanks to JPype.) And virtually everything you do in the GUI can be automated, because that's how Comsol was designed.

MPh is just a Python wrapper with a number of convenience functions layered on top. It doesn't concern itself with most of Comsol's specifics.