Unreliable results for water flow in thin pipe

[kevinreshower]

Hi,

sorry, I just saw that the question was already answered 5 days ago.

Converged, But incorrect results

Hi @sgmkhan3! Have you tried running the simulation with velocity inlet and pressure outlet instead of pressure inlet & outlet? Usually if you set both boundary conditions as velocity or pressure the solver has problems converging. As far as I can see the last runs you did look good also in terms of convergence - which is not a guarantee that your simulation is correct (whatever correct means). Are you trying to validate experimental data of the Yamaha or is it a just-for-fun-simulation? Cheer…

My ultimate project contains 2 inlets and 1 outlet though and also fails to converge:
third attempt
What is the recommended approach with three openings

Cheers
Kevin