Hi @3Faker3,
If I understand correctly, you would like to modify ASPECT’s internal solution (temperature, composition) at various points in time.
There are ways to to this, and the prescribed velocity cookbook shows how define to prescribe internal velocities for a subduction corner flow problem. This approach can be applied to temperature and composition fields, and be adapted to have temporal dependence.
However, some things to keep in mind:
- Modifying the internal solution can lead to significant solver instabilities, especially for a problem with highly nonlinear reactive melt transport.
- Accordingly, it will take a large amount of testing and debugging to get this to work properly (if at all).
As such, I recommend first considering whether you can achieve the same time-dependent behavior through changes to boundary conditions, which already have the ability to handle time-dependent functions.
Cheers,
John