Kratos: How to modify the time-step during the calculation

[AlejandroCornejo]

Dear community,

Due to several cases that I've been running these days I've been thinking about reducing or increasing the time-step during the calculation and I have several doubts about that:

1. Is it possible?
2. Which are the main steps to do that?

Thank you kindly,

[rubenzorrilla]

We actually do it in the FluidDynamicsApplication according to the CFL so if your time scheme is implemented such that the delta time is not assumed to be constant, I think it should be perfectly possible.

[AlejandroCornejo]

thank you @rubenzorrilla ! In my app I'm using the SolidMechanicsApp @josep-m-carbonell schemes, Are we allowed to do that?

[philbucher]

also the schemes in the core are afaik able to handle variable time-steps

the python-solver does AdvanceInTime in this function you could change the timestep

[loumalouomega]

It is possible with the core schemes, I don't know about SolidMechanics

[marandra]

I am also interested on variable time step during calculation. I understand that core schemes can handle variable time steps; what I would particularly like to know is if there is already a mechanism for specifying different time steps values at different time ranges (like a table or so) in the ProjectParameters, process, or similar.

[loumalouomega]

Can we close this, and continue the discussion on #4509? So many issues make it difficult to follow

[AlejandroCornejo]

yes!! let's continue there

[loumalouomega]

OK