Vacuum Pump Question
 

Hi All

I am trying to model a gas flow problem which can be broken down basically into a gas inlet into a chamber and a pipe leading out of the chamber to pump.

Having looked around I see that there is a neat way to model vacuum systems by treating it as a thermal problem where the various system components have clear conversions from a vacuum problem to a heat problem. This workaround is used predominantly for the UHV (ultra high vacuum) regime in which molecular collisions are dominating the system.

I am trying to model a system where flow is still dominating say 0.01bar to 10bar.

I'm trying to find out if there is a way to set the outlet boundary of the condition (the pump) to match the characteristics of the pump's i.e. a pressure dependent pumping capacity (see curve).

https://www.agilent.com/cs/publishin...peed-graph.png

I've had convergence using an outlet vent and then setting a target mass flow to a fixed point taken from this curve, but I'd like to take the model to the next step and include the curve.

Any input is much appreciated!

Thanks in advance

Hi, Have you found the solution?