Learning Forum

[pratheeba.chandanagarajan]

 

Hi,

I am trying to get UDF for solid (cordierite) specific heat as a function of temperature.

I made the following UDF:

DEFINE_SPECIFIC_HEAT(cell_specific_heat, T, Tref, h, yi)
{

  real T = C_T(c,t);

/* Units of Cp_Porous is in J/kg/K */

    real Cp_porous = 1.071 + 1.56e-4*T – 3.435e4/(T*T);
*h = Cp_porous*(T-Tref);
  return Cp_porous ;
}

ReactionKineticsImplicitV2.c(268,8): error: redefinition of ‘T'

real T = C_T(c,t);

^

ReactionKineticsImplicitV2.c(265,42): note: previous definition is here

DEFINE_SPECIFIC_HEAT(cell_specific_heat, T, Tref, h, yi)

^

ReactionKineticsImplicitV2.c(268,18): error: use of undeclared identifier ‘t'

real T = C_T(c,t);

^

ReactionKineticsImplicitV2.c(268,16): error: use of undeclared identifier ‘c'

real T = C_T(c,t);

 

Can you help me to resolve these errors?

2. The Polynomial is Cp = a + BT + C/(T^2). Can the built-in polynomial handle this equation?

 

Thank you so much.

Pratheeba