Ondulations/Pertubations in alpha.water surface
 

Hi all

I am experiencing some weird behaviour of the water/air interphase, see attached screenshot. I get some small ripples in my interphase between air and water.

I am only using blockMesh to create the mesh, and using wave2Foam to calculate a streamfunction wave. Why to i see those ripples in the watersurface?? The models runs fine, no errors in checkMesh.

I am running OpenFOAM v2012.

Best
Rasmus

Hello,

Bad mesh.

1. Use regular cells without these large growth rates in the region of wave propagation.

2. increase the number of subcycle for alpha : 5

3. decrease your time step

Good luck.

Paulin

Thank your for replying.
I resolved it from the first step you suggested. Usually I would try and keep an aspect ratio of 1, but the expansionrates were apparently the issue..
My timestep was set to dynamic.

Thank you!