Choice of turbulent models for jet impingement

September 27, 2004, 17:56

Hello,

I am currently working on submerged jet impingement cooling using the K-Epsilon "realizable" and K-Omega models. Could you give me the values of the wall Y+ that I should use with both these models? Thanks in advance for any suggestions.

Akash

September 28, 2004, 02:58

Would suggest starting with the one equation model, Spallart Allmaras. y+ vaues near 1, or over 30. check with the skin friction coefficient results from literature. that should give you a starting point.

Query: is this a supersonic jet impingment study that you are conducting?

cheers Nandu

September 28, 2004, 12:23

Hi Nandu,

Thanks for your input. I am modelling subsonic jet impingement. I tried the Spallat Allmaras model but my problem requires refinement near the wall and hence the need for enhanced treatment near the walls. This option is provided by the K-epsilon model and that is why I chose this model.

Thanks, Akash

September 27, 2004, 17:56	Choice of turbulent models for jet impingement	#1
Akash Guest Posts: n/a	Hello, I am currently working on submerged jet impingement cooling using the K-Epsilon "realizable" and K-Omega models. Could you give me the values of the wall Y+ that I should use with both these models? Thanks in advance for any suggestions. Akash

September 28, 2004, 02:58	Re: Choice of turbulent models for jet impingement	#2
N Menon Guest Posts: n/a	Would suggest starting with the one equation model, Spallart Allmaras. y+ vaues near 1, or over 30. check with the skin friction coefficient results from literature. that should give you a starting point. Query: is this a supersonic jet impingment study that you are conducting? cheers Nandu

September 28, 2004, 12:23	Re: Choice of turbulent models for jet impingement	#3
Akash Guest Posts: n/a	Hi Nandu, Thanks for your input. I am modelling subsonic jet impingement. I tried the Spallat Allmaras model but my problem requires refinement near the wall and hence the need for enhanced treatment near the walls. This option is provided by the K-epsilon model and that is why I chose this model. Thanks, Akash

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