[watsonle]

Using CFX, I'm trying to turn off a mass flow rate using an expression such that when my concentration level of CO using an additional variable reaches a certain limit. This works great with an "if statement" but the problem is it turns back on later in the solution because the concentration level drops back below my qualifier. I don't want the mass flow to turn back on.

Any way to do this without using FORTRAN?

Highest Respect,

Lee

[ghorrocks]

A simple way of doing this is to use the CO trigger to stop the simulation. Then you restart the simulation with the mass flow boundary turned into a wall, so it can never turn back on.

[watsonle]

Yep. This works. We used Configurations to automatically start the next run.

Thanks so much Glenn.