Multiple outlet treatment in OpenFoam

hooman.4028 · July 18, 2017, 15:25

Hello experts,

I have a question. How dow OF split the flow between multiple outlets? Is it based on the area? I have a geometry with multiple outlets, and my data do not match with another CFD solver (It is very much trusted). I know that the other solver splits the flow between outlets based on their areas and corrects the outlet velocity for each outlet to satisfy continuity. I suspect that the difference might be because of the way OF treats multiple outlets?

Thank you very much!

piu58 · July 19, 2017, 01:38

OF does not "know" outlets. It only "knows" boundary conditions. Which amount of flow goes to and through an outlet depends on the b.c. itself and the whole flow field.

July 18, 2017, 15:25	Multiple outlet treatment in OpenFoam	#1
hooman.4028 Member Hooman Join Date: Apr 2011 Posts: 35 Rep Power: 15	Hello experts, I have a question. How dow OF split the flow between multiple outlets? Is it based on the area? I have a geometry with multiple outlets, and my data do not match with another CFD solver (It is very much trusted). I know that the other solver splits the flow between outlets based on their areas and corrects the outlet velocity for each outlet to satisfy continuity. I suspect that the difference might be because of the way OF treats multiple outlets? Thank you very much!

July 19, 2017, 01:38		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	OF does not "know" outlets. It only "knows" boundary conditions. Which amount of flow goes to and through an outlet depends on the b.c. itself and the whole flow field. hooman.4028 likes this. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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