Turbulence Intensity problem

[Anonymous]

Hello,
I'm looking to find a solution, for the more than 1 (100%) turbulence intensity inside the room.
How have to setting the turbululence parameters, that inside the room the turbulence intensity values be under 100% or some place, maybe a little more, because of the calculation fault?
The first picture, show the turbulence intesity. In the red zone, the intensity more than 1.
In the second picture we can see, the a 0.15 m/s velocity (iso surface).

Thanks for anybody help. 

MARK

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[frederic.gaillard.7]

Hello 

turbulence intensity is only a parameter to caracterize the flow. Check the exact formula here. 
You have the opportunity to change the turbulence intensity in the Advanced  Turbulence Parameters  but i will not recommend to change this value, currently setted to 0.05, specially for you type of simulation.  
Fred

[Anonymous]

Thank you for your reply. In the Standard the turbulence intensity average value is determined. For tangential air conduction systems about 40-60%. How can I reach that for the room?

MARK

[frederic.gaillard.7]

 What is you Standard? 

Can you attach a piece of documentation where you find your values of 0.4-0.6. 

[Anonymous]

In the ISO 7730.

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[Anonymous]

Here is what autodesk say about Turbulence Intensity 

Why dont you try a simulation at 5% and another one at 40% ?

[Anonymous]

I've tried already, but it wasn't show major difference. By the way, that applies for the inlet, but the 40% in the standard it's concern for the all room.

[frederic.gaillard.7]

Hello @Anonymous , 

Are you sure that the definition of turbulence intensity of the iso norm are the same as the turbulence intensity of a RANS turbulence model ? The parameter used in a thermal comfort studies might be different that the one adopted in fluid mecanics. 

Fred