# Flow coming from Industrial radial fan simulation in duct

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November 7, 2014, 12:42
Flow coming from Industrial radial fan simulation in duct
#1
Member

Christian
Join Date: Apr 2014
Posts: 74
Rep Power: 4
Hi all,
I am trying to simulate the flow driven by an high-pressure industrial fan in a duct.

The ideal BCs would be:
-inlet:
p = 111325
U = 10
-outlet
p=101325
U = inletOutlet or similar (just to assure mass conservation

-walls:
U fixedValue uniform (0 0 0 ).

I understood that it is not possible to set up these BCs in simpleFoam, so I am trying to use rhoSimpleFoam (see case in attachment).
I tried any possible combination of BCs my mind came up with but I could not get meaningful results, could anyone enlighten me on a proper setup?
Attached Files
 duct.tar.gz (6.1 KB, 0 views)

 November 8, 2014, 14:28 #2 Senior Member   Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,211 Blog Entries: 1 Rep Power: 17 im not expert about compressible flow but in incompressible flow when u set pressure, use pressureInletVelocity for velocity __________________ Telegram channel (https://telegram.me/openfoam4Iranian) My Weblog (http://openfoam.blogfa.com/) Training Course on OpenFOAM at (http://www.isme.ir/)

November 10, 2014, 05:05
#3
Member

Christian
Join Date: Apr 2014
Posts: 74
Rep Power: 4
thank you for the reply, in fact this works with incompressible but the same BCs do not work for compressible!
I don't know if it's the BCs or something related to numerical schemes!

Quote:
 Originally Posted by nimasam im not expert about compressible flow but in incompressible flow when u set pressure, use pressureInletVelocity for velocity

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