How to correct the back flow
 

Dear Foamers,

I have some issue from openfoam simulation and need your kind help.

I am simulating falling liquid film on a vertical plate, the geometry is shown as attached.

https://photos.app.goo.gl/jeZFvWZteaQheBr79

I simply applied the boundary conditions from DamBrake tutorial but I always get strong back flow at the outlet. Could anyone help me to get out of this issue? Thank you a lot!

Best,

JZ

can you tell more about your case?
where is the inlet/outlet/walls/other patches?
what is the blue/red colored area? which fluid is entering where
and exiting your domain?
show us your initial value files.