# How to do turbulent bc on the injection slot?

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 June 12, 2004, 01:32 How to do turbulent bc on the injection slot? #1 peter.zhao Guest   Posts: n/a I want to calculate that the N2 gas flow from slot at the wall injects transversely into the supersonic air main stream with K-Omega turbulence model, but I don't know how to deal with the bc on the injection slot for K-Omega turbulence model. All comments are welcomed! Thank you in advance.

 June 14, 2004, 09:02 Re: How to do turbulent bc on the injection slot? #2 javadi Guest   Posts: n/a hi. if the geometry of channel injection is defined then you can solve the channel of the jet injection with the main stram cross-flow and for the inlet of channel jet flow you can use uniform velocity profile your project is simillar of mine " compressible turbulent Jet Crossflow Interaction whith sevaral turbulence model(spc. k-e k-w and RSM)- application in gas turbine film-cooling smulation" i'm workinkg on this project since two yares ago

 June 14, 2004, 09:19 Re: How to do turbulent bc on the injection slot? #3 peter.zhao Guest   Posts: n/a How do you set the k and w at the exit of inject? I have found many paper don't make clear this question. One AIAA paper says the turbulent viscous coefficient eqaul to laminar viscous coefficient and k is set by the experiment; Wilcox gived a formula for w at the mass injection but no information for the turbulent viscous coefficient and turbulent kinetic energy K in his famous book "Turbulence modeling in CFD", 1998. Can you give me some information in detail?

 June 26, 2004, 07:05 Re: How to do turbulent bc on the injection slot? #4 javadi Guest   Posts: n/a if you solve the channel jet with the main stream flow simultaneously there is no need to enforce any boundary condition at jet exit.

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