K-e in a laminar flow - what happens

November 18, 2003, 11:10

I was wondering. When doing a turbulence calculation using e.g. K-e or RSM, what happens in the regions of the domain where the flow is laminar?

Will the model impose some false turbulence, or???

Cheers, Christian

November 18, 2003, 12:32

Yes. The turbulence's production is only driven by the velocity gradients. The destruction of turbulence is epsilon. So there is no reason for the turbulence to collapse in the "laminar" regions.

Sylvain

November 24, 2003, 12:04

hi, did u find ur answrer or u still need more information. if yes then let me know. i have got good material on t his topic .

be happy and enjoy

November 26, 2003, 02:30

Dear frined, I wanted more information on this can you...? eagerly waiting for your reply.. bye

November 26, 2003, 08:13

Sylvain's answer is satisfying, but I am interested in background material if you have some.

December 1, 2003, 08:08

I am also in need of some matrial in that area. Nauty professor should give some idea!.. bye

November 18, 2003, 11:10	K-e in a laminar flow - what happens	#1
Christian Guest Posts: n/a	I was wondering. When doing a turbulence calculation using e.g. K-e or RSM, what happens in the regions of the domain where the flow is laminar? Will the model impose some false turbulence, or??? Cheers, Christian

November 18, 2003, 12:32	Re: K-e in a laminar flow - what happens	#2
sylvain Guest Posts: n/a	Yes. The turbulence's production is only driven by the velocity gradients. The destruction of turbulence is epsilon. So there is no reason for the turbulence to collapse in the "laminar" regions. Sylvain

November 24, 2003, 12:04	Re: K-e in a laminar flow - what happens	#3
nautty professor Guest Posts: n/a	hi, did u find ur answrer or u still need more information. if yes then let me know. i have got good material on t his topic . be happy and enjoy

November 26, 2003, 02:30	Re: K-e in a laminar flow - what happens	#4
rslgp Guest Posts: n/a	Dear frined, I wanted more information on this can you...? eagerly waiting for your reply.. bye

November 26, 2003, 08:13	Re: K-e in a laminar flow - what happens	#5
Christian Guest Posts: n/a	Sylvain's answer is satisfying, but I am interested in background material if you have some.

December 1, 2003, 08:08	Re: K-e in a laminar flow - what happens	#6
rslgp Guest Posts: n/a	I am also in need of some matrial in that area. Nauty professor should give some idea!.. bye

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