Back Flow in 3D Dam Break
 

Hi,

I am solving the 3D dam break case in OF 5.0 with flow hitting an obstacle. I created a reservoir in the initial part and used setFields to place 40 cm of water. I defined walls all around the domain. The BC for 'atmosphere' patch is 'inletOutlet'. The calculation with interFoam goes to completion smoothly. The problem is that viewed in paraFoam, the flow does not go forward (does not enter the channel) but recedes backward and after a second or so there is no water.

I need your help about how to plug the escape of water and make simulation work.