Reply To: Multiphase flow – Free surface jet deviation to analytic solution

[christian.scheffler]

Now the free surface jet and the analytic solution is more or less equal. The model needed the following changes compared to the above settings:

• use openings for left and right wall instead of wall left and outlet/wall right
• setting a physical timescale of 0.05

This improved significantly the convergence.
Neither one of the settings alone did the trick.
The timescale value (time step) is just a guess, I didn’t calculated it based on the Solver Theory Guide. But it is certainly a better option to calc it according to 1.273, 1.274, 1.275 (2023R1). Just to mention it here: the jet velocity is 4m/s, the dimension of the jet in x about 1m, the cell size 1.5mm x 1.5 mm x 1.0 mm. The jet width is resolved by about 10 cells.