|
[Sponsors] |
November 25, 2008, 06:23 |
Implementing special K-eps with UDF
|
#1 |
Guest
Posts: n/a
|
Hi,
I would like to implement a modified K-eps 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 aero-acoustic application, AIAA 2002-2316. Is it simple to do it in Fluent? The first model is basically Jones-Launder 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 |
|
November 25, 2008, 08:11 |
Re: Implementing special K-eps with UDF
|
#2 |
Guest
Posts: n/a
|
did you want to use the low Re k-epsilon model? the Jones-Launder available is a low k-epsilon model and in the low k-e model there is no need for wall functions check it.
|
|
November 26, 2008, 12:44 |
Re: Implementing special K-eps with UDF
|
#3 |
Guest
Posts: n/a
|
Have you done some progress? I also want to implement a modified low-Re model and I need some help
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Special Interest Groups | hani | OpenFOAM | 0 | June 27, 2006 03:45 |
help for special function | YANG | Main CFD Forum | 3 | August 4, 2003 11:12 |
special injections----Help! | fanadam | FLUENT | 4 | September 6, 2002 12:24 |
About special purpose FLAIR | Constantinos Constantinou | Phoenics | 1 | June 11, 2001 23:45 |
About special purpose Airpak | Constantinos Constantinou | FLUENT | 0 | June 11, 2001 11:00 |