u/teknomiam

Hi, I'm working on a dam break model, I have an unsteady flow slowly filling my reservoir and a breach that requires 0.1s computation time. I used the advanced time step control to improve overall speed.

worked very well until yesterday where it was acting the exact opposite as it should (low time step on slow filling and larger time step as soon as the breach happens), with the exact same files (geometry, input, parameters...).

I've compared every parameter with my backup files but I can't find any difference.

What can be the problem ?