CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   STAR-CCM+ (https://www.cfd-online.com/Forums/star-ccm/)
-   -   Volume flow rate as the boundary condition (https://www.cfd-online.com/Forums/star-ccm/242949-volume-flow-rate-boundary-condition.html)

Erikaaa May 21, 2022 04:27

Volume flow rate as the boundary condition
 
Hello everyone!
I faced some problems when using Star-CCM+.

(1) In engineering field, volume flow rate is more commonly used than mass flow rate. Therefore, I would like to ask how to set up volume flow rate inlet in Star-CCM+. If there is no direct way to set volume flow rate, is there an alternative method?

(2) The outlet is usually set as pressure-outlet. I want to ask if continuity can be guaranteed (I mean the inlet and outlet flow rates are equal).

I would appreciate it if someone could help me.

Thank you!

LuckyTran May 23, 2022 01:50

Volumetric flowrates are specified using velocity inlets and very rarely velocity "outlets."


You are solving a momentum balance equation and a mass continuity equation, so your result had better meet continuity criteria or you have another problem.


All times are GMT -4. The time now is 10:23.