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Turbulent Intensity boundary condition

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Old   February 4, 2015, 10:26
Default Turbulent Intensity boundary condition
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Hi everybody,

Does anyone know how I can precribe a turbulent intensity boundary condition at an inlet velocity boundary? Im trying to model a 3d rectangular channel with a constant flow and constant turbulent intensity of 10% at the inlet.

Thank you.

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egge24
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Old   February 4, 2015, 11:53
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Select a turbulence model then go to inlet boundary condition, at the bottom in first tab select Intensity & Hydraulic diameter and the give the values.
Intensity & viscosity ratio can also be selected if you can calculate them.
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Old   February 4, 2015, 12:23
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Marauder,

Thank you for your fast response.

I did that, but once I run my model in steady state the surface contour of the inlet shows values of Turbulence below 10%, see figure. I want the lowest value of turbulence intensity at the inlet to be 10%.

Any ideas?

Thank you

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