Opening Boundary (as CFX)

hydraulic · June 21, 2018, 06:55

Hi All,
I am trying to find in OF a similar boundary condition as "opening" in CFX. "With the opening type boundary, as both inflow and outflow are allowed "according to the CFX user guide. Does anyone knows such similar BC ?
Regards

simrego · June 21, 2018, 08:10

Hi!

I don't know what is opening in CFX, but what if you use fixedValue for pressure and zeroGradient for velocity? Then backflow is allowed.

Or inletOutlet and you can specity/disable the backFlow:
https://cpp.openfoam.org/v5/classFoa...d.html#details

June 21, 2018, 06:55	Opening Boundary (as CFX)	#1
hydraulic New Member Join Date: Feb 2012 Location: Nantes Posts: 14 Rep Power: 14	Hi All, I am trying to find in OF a similar boundary condition as "opening" in CFX. "With the opening type boundary, as both inflow and outflow are allowed "according to the CFX user guide. Does anyone knows such similar BC ? Regards

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June 21, 2018, 08:10		#2
simrego Senior Member anonymous Join Date: Jan 2016 Posts: 416 Rep Power: 14	Hi! I don't know what is opening in CFX, but what if you use fixedValue for pressure and zeroGradient for velocity? Then backflow is allowed. Or inletOutlet and you can specity/disable the backFlow: https://cpp.openfoam.org/v5/classFoa...d.html#details