Can I use different turbulence model in dif zones?
 

Dears,

I have seperate the 3D model in two zones, and I want to use different turbulence models in the two zones.

Can I do this in Fluent? Or I have some mistaken idea?

Thanks.

Re: Can I use different turbulence model in dif zo
 

no the idea is good cause some development is made right now at fluent and other to do for example: RANS in the far field and LES close to area of interest (flow around a body for example). Th problem, is what do you use at the interface of the 2 area. If you are an expert both in Fluent and Turbulence devlpment you can do it ... good luck !

Re: Can I use different turbulence model in dif zo
 

Thank you for your reply.

I am not very familar with both Fluent and turbulence, so do you mean that this is too difficult for me?

Thanks again.

Re: Can I use different turbulence model in dif zo
 

Hi,

you may separate your domain in two simulations, one far field with one turb. model, and a close field with another turb. model.

Then do a steady calculation for the first simulation, and take the results at the bondary to the second simulation as starting conditions.

Problem: How to calculate turb. input parameters for the second from the results of the first simulation??? Depends on turb. models... No Idea...

Hope it helps

Ralf

Re: Can I use different turbulence model in dif zo
 

Thanks, Good idea, My thought is zone A -> zone B ->zone A. But the A-B boundary condition and B-A are difficult to define.

It may be just an idea.
:)

Re: Can I use different turbulence model in dif zo
 

I would swear that FLUENT has a UDF to do this in the user's sections of their website. Now I find it again. I'm not sure it is what you want, but: http://www.fluentusers.com/udf_archi...ples/UDF51.htm

Re: Can I use different turbulence model in dif zo
 

I can not link it, Can you send it by Email?

Thanks.