Problem with Pressure Outlet and Openchannelflow

sebebo · August 31, 2015, 06:25

Hello CFD Online,

i am simulating a simple openchannel problem, but the pressure outlet i use acts like an inlet and i am not able to find the cause. I uploaded the cas file, in the hope that somebody can help me.

landerfwc · September 29, 2015, 09:56

I have several notes to your case:
- too coarse mesh. I mean, 400 cells? You should make much finer mesh to get some reasonable solution.
- when using k-epsilon model, the good "fisrt choice" can be Non-equilibrium wall function
-as a surface tension you have used value 72 N/m. The actual value is 72 mN/m - 1000x smaller.

What problem are you trying to simulate?

September 29, 2015, 09:56		#2
landerfwc New Member Join Date: Jun 2014 Posts: 17 Rep Power: 12	I have several notes to your case: - too coarse mesh. I mean, 400 cells? You should make much finer mesh to get some reasonable solution. - when using k-epsilon model, the good "fisrt choice" can be Non-equilibrium wall function -as a surface tension you have used value 72 N/m. The actual value is 72 mN/m - 1000x smaller. What problem are you trying to simulate?