Reply To: Free Surface with Wave Boundary Condition Incorrect Initialization

[rnegrete]

 

 

BCs: 

inlet: velocity-inlet. Open Channel Wave BC ticked, Al defaults in Momentum tab, in Multiphase tab Free Surface=0, Bottom Level=-5.6, Fifth Order Stokes Waves, Wave Height=1.73, Wave Length=20. I ran command define, then o-c-w-s and check passed.

outlet: pressure-outlet, Momentum: defaults, Multiphase Free Surface=0, Bottom Level=5.6.

top: pressure-outlet, Momentum: defaults, Multiphase Free Surface=0, Bottom Level=5.6.

walls: wall: defaults

bottom: wall: defaults

 

The bump is in the wave velocity inlet

 

I did initialize with wave option and the oddity is not visible on the first step but when the wave starts to come in, there's a signifficant change in the slope of the wave giving a similar result during simulation, furthermore, it happens in every wave, not only on the first one.

 

 

I tried with and without surface tension.

 

All the screenshots are from the velocity inlet from where the wave is entering the domain. 

Thanks!