What Is the Overflow Boundary Condition in Fluent?

[Topher925]

Apparently Fluent has this thing called an "overflow" boundary condition. I tried searching the help files and found absolutely nothing about it. Does anyone know what this is and why someone would want to use it?

 

[minger]

Hmmm, google turned up nothing except a few vague references to using an OVERFLOW boundary conditions (note that all references I found used an all-caps notation). Even a journal search turned up nothing.

Perhaps it has to do with actual overflow. That is, it can be a "liquid-only" outflow boundary condition at a free surface?

Other than that guess, I haven't a clue; I've never heard of it.