Fixed flow rate with cyclic BC

Marc-Aurele · July 20, 2015, 09:10

Hello,

I would like to know if it is possible to fix a flow rate with a cyclic BC.
My goal is to have a fully developed flow on all the pipe (= without an entrance region).
I use OpenFoam 2.2.2

Thank you

Marc-Aurèle

Cyp · July 27, 2015, 15:03

Hi Marc-Aurele,

you can go to through this document https://web.stanford.edu/~csoulain/PORE_SCALE/Chap2.pdf from page 11 to 13. The idea is to add an average pressure drop as a source term in your momentum equation. The pressure you solve is then the deviation to the average pressure. Hence, you can consider cyclic condition to the "pressure" field.

Cheers,
Cyprien

July 20, 2015, 09:10	Fixed flow rate with cyclic BC	#1
Marc-Aurele New Member Marc-Aurele Join Date: Apr 2015 Posts: 1 Rep Power: 0	Hello, I would like to know if it is possible to fix a flow rate with a cyclic BC. My goal is to have a fully developed flow on all the pipe (= without an entrance region). I use OpenFoam 2.2.2 Thank you Marc-Aurèle

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July 27, 2015, 15:03		#2
Cyp Senior Member Cyprien Join Date: Feb 2010 Location: Stanford University Posts: 299 Rep Power: 18	Hi Marc-Aurele, you can go to through this document https://web.stanford.edu/~csoulain/PORE_SCALE/Chap2.pdf from page 11 to 13. The idea is to add an average pressure drop as a source term in your momentum equation. The pressure you solve is then the deviation to the average pressure. Hence, you can consider cyclic condition to the "pressure" field. Cheers, Cyprien