[marcel_jay]

Hello Community,
the CHT-Simulation I am doing needs apparently a very long time to reach the steady state condition. Although physically not very complex, the model has some very fine and some very large regions.
For the flow through tight gaps and a high rotation speed of >2000rpm I need timesteps of around 0.002s at least to reach a convergence lower than 5e-5, which I assume as statisfying.
Problematic is, the simulation time might be more than 200s. With 5 loops per step I would get 500,000 iterations, which would take a tiny little bit too long.

Since I have some good results from my steady state, can I use these results as a final (not initial) codition?

I would expect the transient simulation to converge faster and maybe use timesteps of about 0.1 secs.

Cheers and thank you for your kind help
Marcel