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Zero Gradient for in/outlet turbulence condition?

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Old   January 14, 2006, 00:25
Default Zero Gradient for in/outlet turbulence condition?
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Hi guys... I've a quick question about the definition of zero gradient for turbulence when I specify the inlet or outlet boundary condition in CFX. This is the latest add-in to the treatment of boundary condition. I find little information about this from textbook.

Can anyone please help me to understand this term?

1)Is it defined as 0%Turbulence Intensity?

2)Any significant advantage if compared to specifying a constant % of turbulence intensity at inlet/outlet boundary?

Thank you very much.
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