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February 7, 2012, 05:16 |
Hydraulic Pipe Flow, which solver & BC:s?
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#1 |
New Member
Johan Magnusson
Join Date: Oct 2010
Posts: 21
Rep Power: 16 |
Hi!
Im trying to run a hydraulic pipe flow case. The case is basically very simple, more or less a pipe with a converget-divergent nozzle. Im assumed to know the inlet pressure and outlet pressure. Nothing else, i.e unknown velocities. 1. Initially, which solver should i use? I've tried with simpleFoam 2. Which pressure BCs should i use? My set-up now looks like this: boundaryField { inlet { type fixedValue; value uniform 12000000; } wall { type zeroGradient; } outlet { type fixedValue; value uniform 2000000; } } 3. Which U BCs should i use? Im now using a set-up like this { inlet { type pressureInletOutletVelocity; ; value uniform (0 0 0); } wall { type fixedValue; value uniform (0 0 0); } outlet { type pressureInletOutletVelocity; value uniform (0 0 0); } } I've also tried zeroGradient without success! Plz help me out, its so easy to setup using Ansys CFX, a verification in OF would be preferable! BR /magjohan |
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February 7, 2012, 11:50 |
U zeroGradient inlet
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#2 |
New Member
AV.
Join Date: Apr 2011
Posts: 14
Rep Power: 15 |
Did you try to set U as zeroGradient in the inlet BC ?
I mean : { inlet { type zeroGradient; } wall { type fixedValue; value uniform (0 0 0); } outlet { type pressureInletOutletVelocity; value uniform (0 0 0); } |
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February 8, 2012, 10:52 |
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#3 |
New Member
Join Date: Jan 2012
Posts: 23
Rep Power: 14 |
Hi johan,
I am a new to openfoam and cfd in general. I want to simulate a steady state, compressible flow of air through a bent pipe. Which solver can i use for this in Openfoam?? It would be great to get some help regarding my problem. Thanking you in advance Regards Abhinay |
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February 8, 2012, 17:02 |
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#4 |
New Member
Johan Magnusson
Join Date: Oct 2010
Posts: 21
Rep Power: 16 |
Hi, I have tried with the mentioned boundary conditions, without any good results.
Andrev: I would make it simple and use the already implemented rhoSimplecFoam |
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February 28, 2012, 07:58 |
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#5 | |
New Member
Join Date: Sep 2011
Posts: 10
Rep Power: 15 |
Quote:
Hi Johan, do u have any improvement? My case is i know inlet T, P and Velocity...also outlet T, P.... Hoever i want to let the openfoam to calculate the outlet Velocity ...I tried to use oulet { type pressureInletOutletVelocity; value uniform (0 0 0); } but i dont know if setting value uniform (0 0 0); is correct or not?! } |
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