Learning Forum

[Max4]

Hello,

I have a question about the UDF for the specific heat in FLUENT.

The unit of the Temperature is Kelvin?

Moreover the value of Tref should be set in the Materials Panel?

I wrote this UDF for calculating the specific heat ( in J/kg.K):

#include "udf.h"

DEFINE_SPECIFIC_HEAT(my_user_cp, T, Tref, h, yi)
{
    real cp;

    cp = 5.661*T + 551,21;

    *h = cp*(T-Tref);
    return cp;
}

 

Regards,

Maxime

[Amine Ben Hadj Ali]

Yes it is in Kelvin.  Yes Tref is set in the material panel.

For a simple formulation that you have it is enough to use polynomial function.

[Max4]

Thank you for your answer.

Maxime