So, i make a few new simulations, with the cropped geometry.
Here is a video, with the “goal” the waterlevel measurement.
The bc at the outlet (all values zero gradient) looks like it’s working well.
I the waterlevel is not longer rising at 8 seconds, so i think we have a stady state ? May i have to calculate 15 seconds ?
The time duration for 10 seconds are 639 min and 85 core hours.
I made a chart, with the delta t of each time step and the runtime.
The deltaT places itself at < 2.5e-04 seconds, may is it possible to increase it ?
Is the timestep only based on the courant value ?
I got two more question.
The Run 3 Mesh 3 5 sec and the Run 4 Mesh 3 10 sec are totaly equal, except the simulation time.
At the Run 4 i got a notification because of high courant values > 1. Why only at Run 4 not in Run 3 ?
At the convergence plot of Run 4, you can see that the residual of p_rgh jumps up and down from 5 seconds runtime till the end. May its responsible for the little deltaT at the time steps ?