Storage of numerical solutions

[zxcdsaqwe8]

Hello, teacher. I want to calculate the convergence order of a problem without an exact solution. I would like to ask, in Firedrake, is there a way to store the numerical solution for each moment? In preparation for subsequent calls.

[dham]

If you want to store a numerical solution for later use, for example to compute a convergence rate, then you can just copy the Function. There's an example of this in cells 8 and 9 of this notebook: https://nbviewer.org/github/firedrakeproject/firedrake/blob/master/docs/notebooks/04-burgers.ipynb