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-   -   Constant Volumetric Flow Rate Boundary Condition (http://www.cfd-online.com/Forums/main/10132-constant-volumetric-flow-rate-boundary-condition.html)

Hadley October 20, 2005 23:13

Constant Volumetric Flow Rate Boundary Condition
 
I am modelling the unsteady evacuation of a vessel (in Fluent) by a rotary vacuum pump, hence I require a constant volumetric flow rate boundary condition for the vessel. Is it possible to model this? Using a mass source (well, a mass sink I suppose!) doesn't seem appropriate to me, because the density of the gas changes with time. Any advice appreciated!


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