PressureOutlet

carlodean · June 24, 2008, 05:15

hi everibody,
I'm tryng to simulate a waterfall with rasInterFoam and I'd like to compare these results with another simulation made with Fluent.
As BC at the atmosphere in Fluent I have pressureoutlet, in which I can set Turbulent Intesity and Viscosity Ratio.
But if I set pressure outlet in Openfoam I have zerogradient for k and epsilon at the BC, and what I see is that k and epsilone go to zero in the domain while in Fluent they are constant.
Could someone give me some advice on which BC could I set to replicate the same case thate I have in Fluent.
Thank you
Best regards
Carlo

sErik · January 28, 2010, 05:45

I would also be interested in this question.
I have a pipe flow with a fix inlet velocity and pressure. At the outlet I want to have the resulting pressure, but with zeroGradient it doesn't seem to work so fine. Shouldn't it also be able with pressureOutlet - but therefor I need a entry for value, but which?

Regards!

June 24, 2008, 05:15	hi everibody, I'm tryng to si	#1
carlodean New Member Carlo De Angelis Join Date: Mar 2009 Posts: 10 Rep Power: 17	hi everibody, I'm tryng to simulate a waterfall with rasInterFoam and I'd like to compare these results with another simulation made with Fluent. As BC at the atmosphere in Fluent I have pressureoutlet, in which I can set Turbulent Intesity and Viscosity Ratio. But if I set pressure outlet in Openfoam I have zerogradient for k and epsilon at the BC, and what I see is that k and epsilone go to zero in the domain while in Fluent they are constant. Could someone give me some advice on which BC could I set to replicate the same case thate I have in Fluent. Thank you Best regards Carlo

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
operating pressure and pressureoutlet	free	FLUENT	2	April 14, 2004 17:17

January 28, 2010, 05:45		#2
sErik Member Join Date: Nov 2009 Location: Munich Posts: 43 Rep Power: 16	I would also be interested in this question. I have a pipe flow with a fix inlet velocity and pressure. At the outlet I want to have the resulting pressure, but with zeroGradient it doesn't seem to work so fine. Shouldn't it also be able with pressureOutlet - but therefor I need a entry for value, but which? Regards!