Calculation of new time step size using max_retries

[robertf]

I'm trying to understand how the automatic time-step controller works. In FETimeStepController.cpp I see

m_ddt = (dt) / (m_maxretries + 1)

However, the description in Section 3.3.2 of the User's Manual seems to imply that it should be

m_ddt = (dt) / (m_maxretries)

My C++ is very weak so maybe I'm missing something obvious?

- Robert

[maas]

Hi Robert,

It's been a long time since I looked at this part of the code, or its documentation, but I think what's in the code is the correct approach. For instance, imagine the max_retries is set to 1. The documentation's description would suggest that the new time step is set to zero, which would not make a lot of sense. On the other hand, the code's algorithm would set the next time step to 1/2 of the previous time step.

I'll update the documentation accordingly. Thanks for catching this.

Best,

Steve