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shear rate in a UDF

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Old   January 24, 2013, 11:14
Default shear rate in a UDF
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Thomas Hoffmann
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Hi all.
I'm trying to write a UDF that describes the viscosity as a function of temperature. I also need to insert the shear rate (gamma_dot), which I think is already calculated in fluent. But how do I call it? My code is seen below - Any hint would be very nice


DEFINE_PROPERTY(pl_visc, c, t)
{
real mu;
real temp = C_T(c,t);
real gamma_dot=???;
{

mu = 2*exp(-0.7*(temp-273))*pow(gamma_dot,(0.5-1));

}
return mu;
}
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Old   January 28, 2013, 04:23
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Max
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C_STRAIN_RATE_MAG(c,t)

cheers
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