Mass flow rate in a 1/4 pipe (periodic boundary)

allamarein · April 30, 2009, 14:15

If I draw only 1/4 of the real inlet of the pipe (I use periodic condition and I study only a "V" domain), I have to set 1/4 of the mass flow rate?

-mAx- · May 1, 2009, 00:16

yes.
But you can use also the symmetry BC

sourplum · May 1, 2009, 09:28

I think better u use symmetry BC. U can find the tutorial here

Best regards,
sourplum

allamarein · May 1, 2009, 14:41

You are right.
I've not specified that I have 4 radial injection flows equally spaced, so I used a periodic boundary condition (and not symmetry)

I set periodic boundary conditions with 0 pressure gradient

April 30, 2009, 14:15	Mass flow rate in a 1/4 pipe (periodic boundary)	#1
allamarein New Member Join Date: Mar 2009 Posts: 14 Rep Power: 16	If I draw only 1/4 of the real inlet of the pipe (I use periodic condition and I study only a "V" domain), I have to set 1/4 of the mass flow rate?

May 1, 2009, 00:16		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,293 Rep Power: 40	yes. But you can use also the symmetry BC __________________ In memory of my friend Hervé: CFD engineer & freerider

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May 1, 2009, 09:28		#3
sourplum New Member sourplum Join Date: May 2009 Location: Perak, Malaysia Posts: 11 Rep Power: 16	I think better u use symmetry BC. U can find the tutorial here Best regards, sourplum

May 1, 2009, 14:41		#4
allamarein New Member Join Date: Mar 2009 Posts: 14 Rep Power: 16	You are right. I've not specified that I have 4 radial injection flows equally spaced, so I used a periodic boundary condition (and not symmetry) I set periodic boundary conditions with 0 pressure gradient