Swirl flow recirculation
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:
flowRate 0.021; // [kg/s]
value uniform (0 0 0);
other outlet BC's:
pressure is fixed
zeroGradient k and epsilon
swirl velocity (as attached above)
fixed value of k and epsilon
Department of Engineering,
University of Cambridge
try to reduce the angle to less than 5 deg and use wedge BC.
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?
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.
|All times are GMT -4. The time now is 08:03.|