Naresh Patre
Ansys Employee

Hello Klara

It looks like there is some issue while solving the case with highest fidelity. When I reran the case1, this time I got reasonable results, but the velocity contours were all red. 

When I tried running the same case with default fidelity, I got expected results for pipe length upto 10m. See below snapshot.


Can you try running the cases with default fidelity and let me know how it goes?