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Eddy viscosity VS Turbulent viscosity

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Old   February 26, 2019, 22:24
Default Eddy viscosity VS Turbulent viscosity
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Naveed
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Greetings members,
I want to investigate eddy viscosity (m2/s) in Fluent. But, I can find the turbulent viscosity in Fluent with units "kg/m-s".
Is the turbulent viscosity similar to that of eddy viscosity ?? Or should I convert it using the density of fluid ?? Please help. Thank you.
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Old   February 27, 2019, 10:53
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Turbulent and eddy viscosity are the same thing. In your case, it's clear that you need to divide the turbulent viscosity from Fluent by the density to get the thingy that you want. I wouldn't call this the eddy viscosity (because it doesn't have units of viscosity) but eddy diffusivity (having the same units as diffusivity). Anyway, what you decide to call it is up to you.
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Old   February 27, 2019, 21:52
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Quote:
Originally Posted by LuckyTran View Post
Turbulent and eddy viscosity are the same thing. In your case, it's clear that you need to divide the turbulent viscosity from Fluent by the density to get the thingy that you want. I wouldn't call this the eddy viscosity (because it doesn't have units of viscosity) but eddy diffusivity (having the same units as diffusivity). Anyway, what you decide to call it is up to you.
Thank you for the kind response.
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