Question on mass flow BC

fijinx · April 12, 2010, 12:40

If I am defining a fixed mass or volumetric flow rate on a simulation that uses wedge symmetry, do I define the fraction of flow rate for the cross section that I have modeled or the mass flow rate for the entire model? Thanks!

mabinty · April 15, 2010, 06:17

the flow rate is calculated with the modeled cross section, hence a isosceles triangle with opening angle of 5°.

cheers,
aram

fijinx · April 15, 2010, 12:37

Thank you! So just to be clear (to make sure I understand) if I were doing pipe flow, and I wanted a mass flow of 100kg/sec at the inlet of the whole pipe I would only put 5kg/sec for the inlet at the wedge?

April 12, 2010, 12:40	Question on mass flow BC	#1
fijinx Member James Baker Join Date: Dec 2009 Posts: 35 Rep Power: 17	If I am defining a fixed mass or volumetric flow rate on a simulation that uses wedge symmetry, do I define the fraction of flow rate for the cross section that I have modeled or the mass flow rate for the entire model? Thanks!

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April 15, 2010, 06:17		#2
mabinty Senior Member Aram Amouzandeh Join Date: Mar 2009 Location: Vienna, Vienna, Austria Posts: 190 Rep Power: 18	the flow rate is calculated with the modeled cross section, hence a isosceles triangle with opening angle of 5°. cheers, aram

April 15, 2010, 12:37		#3
fijinx Member James Baker Join Date: Dec 2009 Posts: 35 Rep Power: 17	Thank you! So just to be clear (to make sure I understand) if I were doing pipe flow, and I wanted a mass flow of 100kg/sec at the inlet of the whole pipe I would only put 5kg/sec for the inlet at the wedge?