Implementing special Keps with UDF
Hi,
I would like to implement a modified Keps model in Fluent, for subsonic/supersonic axisymmetric jet flow computations. I'd like to use either : H. Shen, C. K. W. Tam, Numerical simulation of the generation of axisymmetric mode jet screech tones, AIAA Journal Vol. 36, No. 10, October 1998. or : Dash, S.M., Kenzakowski, D.C., Papp, .J.L., Progress in jet turbulence modelling for aeroacoustic application, AIAA 20022316. Is it simple to do it in Fluent? The first model is basically JonesLaunder with strongly different coefficients. I have no references for the damping functions near the walls, so I'd have to use standard values: I expect the result to be strongly unstable. The second model has slightly different coefficients, but there are some additional source terms, depending on the curl of the flow and on derivatives of rho*U*U, which again make the equations way more stiff. Has anybody experience with this? Can you give advices/suggestions? Cheers deltaquattro 
Re: Implementing special Keps with UDF
did you want to use the low Re kepsilon model? the JonesLaunder available is a low kepsilon model and in the low ke model there is no need for wall functions check it.

Re: Implementing special Keps with UDF
Have you done some progress? I also want to implement a modified lowRe model and I need some help

All times are GMT 4. The time now is 16:53. 