Creating an internal patch
 

I'm running a multiphase case where I have water leaving a tank and then falling through a volume of air to the ground. I'm trying to figure out my mass flow rate out of the tank. From What I've read I need a patch at the exit of the tank.

I'm using Salome to generate a mesh. The issue im having is creating a patch between my tank and my volume of air...

So I guess ultimately my question is, does anyone know how to create a patch internal to my mesh?

dear my friend
when you use a Salome you must creat a face from your file and choose a name for that for example "Outlet" and when you read your file in openfoam you can see a boundry in constant>polyMesh>Boundry
after that you can define this boundry in 0 folder for BC.
best regards
Sajad

hi,

sorry if I misunderstand you, but that seems not to be working for internal faces. Instead I get a faceZone.

Did you manage to create an internal patch to calculate your mass flux with?