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Old   August 4, 2008, 00:39
Default Turbulence Intensity
  #1
Michael
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Hey, i'm modelling a turbulent flow past a circular cylinder and am unsure on what to set the turbulence intensity at the Re number i am using for the flow is 10,000. Can someone please help?

Cheers.
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Old   August 4, 2008, 01:34
Default Re: Turbulence Intensity
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venkatesh
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normally u can set it to around 4%.any freestream turbulence decays rapidly and doesnt affect the solution much
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Old   August 4, 2008, 02:29
Default Re: Turbulence Intensity
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mAx
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Turbulence Intesity = 0.16 x Re**(-1/8)
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Old   August 5, 2008, 01:02
Default Re: Turbulence Intensity
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Michael
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Cheers thanks for that.

Btw do you also know what i should set my turbulence viscosity ratio as, or should i just leave it as the default value of 10.
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Old   August 5, 2008, 14:22
Default Re: Turbulence Intensity
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Renato Pacheco
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but in case you are using multiphase flow with different reynolds number, you should get the mean Reynolds???
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