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July 19, 2010, 08:35 |
Swirl flow recirculation
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#1 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 16 |
Dear all,
I try to simulate a swirl flow using dieselFoam solver using swirl BC that I compiled in 1.6 version. I try to simulate spray in an open swirl-stabilized burner. So, my geometry could be as simple as a cylinder with spray and swirl flow coming from the inlet. To save computation time, I reduce the domain to a 36 degree sector with cyclic BC. However, I've problem in producing recirculation region and the rotational flow always ended up reaching the exit without producing clear recirculation region. Hereby attached part of the 0/U file: swirl_inlet { type swirlFlowRateInletVelocity; flowRate 0.021; // [kg/s] rpm 2000; value uniform (0 0 0); } other outlet BC's: pressure is fixed zeroGradient velocity zeroGradient k and epsilon inlet BC's: swirl velocity (as attached above) zeroGradient pressure fixed value of k and epsilon cylindrical surface: symmetryPlane Please advise.... Thanks, Fairus CFD Group, Department of Engineering, University of Cambridge email: mfm38@cam.ac.uk |
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July 19, 2010, 11:52 |
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#2 |
Senior Member
Hassan Kassem
Join Date: May 2010
Location: Germany
Posts: 242
Rep Power: 18 |
try to reduce the angle to less than 5 deg and use wedge BC.
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July 20, 2010, 05:00 |
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#3 |
New Member
fairus
Join Date: Apr 2010
Posts: 20
Rep Power: 16 |
Hi Hasan,
Thanks for the reply. The reason why I set the sector to be 36 deg angle is because the swirler has 10 vanes. Is there any way we can do it without changing the sector angle? Fairus |
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July 21, 2010, 12:08 |
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#4 |
Senior Member
Hassan Kassem
Join Date: May 2010
Location: Germany
Posts: 242
Rep Power: 18 |
Dear Fairus,
one of my colleges is working on swirling flow using simpleFoam and PisoFoam. He is facing a lot of troubles however he is using a 3d model. I think maybe the problem with the solvers. I don't really know what is going on? If you have any experience with swirling flow modeling in openfoam, it will be highly appreciated to share here. Best Regards, Hassan |
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June 12, 2015, 11:20 |
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#5 | |
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Howar
Join Date: Mar 2015
Posts: 53
Rep Power: 11 |
Quote:
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