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Interpretation of Turbulent Intermittency Values in SST Gamma-Theta Transitional Mode

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Old   October 31, 2023, 09:19
Default Interpretation of Turbulent Intermittency Values in SST Gamma-Theta Transitional Mode
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Fabio Asaro
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Hello everyone,

I've been working on a simulation of a micro pump, which exhibits both laminar and turbulent flow regimes. For this reason, I've chosen to use the SST Gamma-Theta transitional turbulence model in CFX. Although I know that the model was primarily validated with freestream airfoil cases, it seems to produce reasonable results for my specific application.

However, there's one aspect that puzzles me: the values of turbulent intermittency in my simulation range from 0 to 2. According to the literature, intermittency should only vary from 0 (indicating laminar flow) to 1 (indicating turbulent flow). So, how should I interpret the intermittency values that exceed 1?

I appreciate any insights you can offer.
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