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#1 |
Member
Hagen Müller
Join Date: Nov 2010
Posts: 34
Rep Power: 15 ![]() |
Hello Everyone,
I want to start a calculation on a rotating channel. In that case the governing equations change due to the Coriolis force. Has anybody adjusted a solver or turbulence model to capture these effects? Thanks for your help, hagen |
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#2 | |
New Member
Mo Ah.
Join Date: Apr 2012
Posts: 9
Rep Power: 14 ![]() |
Quote:
Have you managed to solve this probem? I'm stuck on the same, I've tried using moving reference framce as well as simple UDF to incorporate coriolis and centrifugal forces, however I'm still unable to validate my results with that of establised ASME and other papers.... Any suggestions? Thanks, |
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#3 |
Member
Join Date: Oct 2010
Location: Germany
Posts: 39
Rep Power: 15 ![]() |
Hi Hagen,
MRFSimpleFoam should work for your case. Greetings Ivan |
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#4 |
Member
Hagen Müller
Join Date: Nov 2010
Posts: 34
Rep Power: 15 ![]() |
Thanks for your suggestion. However, I think that the MRFSimpleFoam solver alone is not sufficient to account for RANS system rotation thoroughly, since not only the solver, i.e. the momentum equation, but also the turbulence model as well as the scalar flux model (if the energy equation needs to be solved) has to be extended. An additional production term due to Coriolis acceleration appears in both the transport equation for Reynolds stress and the scalar transport equation. More details can be found in the paper by Johnston, Halleen and Lezius (JFM 56, pp. 533-557, 1972). An exemplary extension for an explicit scalar flux model can be found in Younis et al. (Journal Heat Transfer, 132, 2010). Last year I implemented both into OpenFOAM on the basis of SSG and LRR. If anyone is interested in the code, you may send me a private message with your email address so I can provide code + documentation.
Best, Hagen |
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#5 |
New Member
Mo Ah.
Join Date: Apr 2012
Posts: 9
Rep Power: 14 ![]() |
Hi Hagen,
Could I please draw your attention to http://www.cfd-online.com/Forums/fluent/99552-3d-rotating-channel.html#post353897. I've trying to model a 3D rotating channel using FLUENT. I've been unable to match my Nu plots with that of an expermental analysis conducted by Wagner et al 1991. I'm currently using a MRF with a constant angular velocity. Are you suggesting that additional source terms for the body forces induced by coriolis acceleration need to be included even if we are using a MRF?? Regards, |
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#6 | |
Member
Hagen Müller
Join Date: Nov 2010
Posts: 34
Rep Power: 15 ![]() |
Quote:
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#7 |
Senior Member
Huang Xianbei
Join Date: Sep 2013
Location: Yangzhou,China
Posts: 302
Rep Power: 14 ![]() |
Hi,Hagen:
I'm just struggling in this problem using DNS. I modified the icoFoam by adding the Coriolics force, and the centrifugal force is considered to be coupling with the pressure gradient term, so no specially term is added with centrifugal force. I ran the rotating case with a satisfied non-rotating case as the initial condition yesterday, until now the velocity is still increasing(my computer is too slow ![]() znhuang@163.com Huang Xianbei |
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