Dear all,
I am trying to run a Stress-Blended Eddy Simulation with a modified turbulent viscosity for the RANS part, only.
However, when I use DEFINE_TURBULENT_VISCOSITY to modify the RANS turbulent viscosity, it also modifies the LES subgrid model (what I want to avoid)...
I tried a simple if/else statement based on the value of the SBES blending function:
DEFINE_TURBULENT_VISCOSITY(user_mu_t,c,t)
{
if(SBES_BlendingFunction == 1)
{
mu_t = compute_my_RANS_mu_t(...);
}
else
{
mu_t = C_MU_T(c,t);
}
return mu_t;
}
But It does not give the expected results... I also tried to loop over cells and compute it locally but had issues with the implementation...
Any help or advices would be highly appreciated !
Thanks in advance!
Leo Cotteleer use DEFINE_TURBULENT_VISCOSITY macro and after writing the UDF, you may hook it in define/model/viscous panel.To be honest, DEFINE_TURBULENT_VISCOSITY macro replaces the new definition of viscosity in turbulent model. If you would like use the default one and add some extra expression, you can do it by this macro, too. You can combine the default turbulent viscosity and others. Please find the attached manual herewith.
best regards
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