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Density correction function for turbulent viscosity

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Old   January 20, 2015, 03:20
Default Density correction function for turbulent viscosity
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Hello there!

I am simulating cavitating flow in nozzles and i would like to modify the calculationg of the turbulent viscosity.

with the normal formula mu_turb = C_mu*k*k/eps the turbulent viscosity will be overpredicted in the 2-phase region and thus completely change the dynamic behaviour of the cavitation cloud.

One common way of reducing the turbulent viscosity in the 2-phase region is to introduce a function within the formula of the turbulent viscosity:

mu_turb = f(rho)*C_mu*k*k/eps

where f(roh)=rho_v+(\frac{rho_v-rho}{rho_v-rho_l})^{10}*(rho_l-rho_v)

with l and v denoting liquid and vapour.


so at the moment i don't really know where and how i can modify the equation. I would be really thankfull for any kind of suggestions.
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Old   July 9, 2017, 02:44
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Liwei Zhang
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Im face the same problem. It seems can be modified in fluent.i also want to know whether it can be realised in starccm+.


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