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Solidworks Flow simulation - Turbulence intensity and length scale

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Old   January 21, 2025, 11:06
Default Solidworks Flow simulation - Turbulence intensity and length scale
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Hello,
I have recently started my job after graduation and I have started to work with Solidworks Flow Simulation. I am searching help with definition of turbulence properties - turbulence intensity and length scale.
1) Turbulence intensity of small fans for air-cooling of electronics components in devices. I tried to find some approximate values of turbulence intensity for fans but unsuccessfully.
2) Turbulent length scale:
In case of pipe flow, I am not sure whether I should use l=0.038*L or l=0.07*L as stated here: https://www.cfd-online.com/Wiki/Turbulence_length_scale

In a general case, where on the inlet is perforated plate, or the inlets are small openings in device cover, what could be good approximation for l ?

Thanks in advance for suggestions and information.
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