[NPs]

Hi everyone, I have to implement a UDF in fluent as a Wall Heat Generation Rate Profile on this geometric model
modello - Copia.PNG

The wall heat generation must be in the wall of the inner cylinder
and it's defined by these 2 equations


T = (((mu_0)*3,14*(chi_2)*(frequency)*(magnetic_field_ quadrato))/(((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water)))*t ;
real source = ((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water))* T;
I got T then i got real source,the others are parameters with numeric values.
I wrote this code for the UDF

#include "udf.h"
#define mu_0 1,256637*10^(-6) // permeabilità elettrica vuoto (H/m)//
#define chi_2 1,25 //suscettività magnetica
#define frequency 344000 //frequenza campo
#define magnetic_field_quadrato 21000 //campo magnetico
#define mass_NPs 1.5 //massa nanoparticelle
#define cp_NPs 0.67 //calore specifico nanoparticelle
#define mass_water 498.5 //massa acqua
#define cp_water 4.18 //calore specifico acqua


DEFINE_PROFILE(wallheatgenerate,thread,i)
{
real t = CURRENT_TIME
delta_T = (((mu_0)*3,14*(chi_2)*(frequency)*(magnetic_field_ quadrato))/(((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water)))*t ;
real source = ((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water))* T;;
face_t f;

begin_f_loop(f,thread)
F_PROFILE(f,thread,i) = source;
end_f_loop(f,thread)
}

Then i got this error "f:undeclared variable" and "parse error" on these lines

15 delta_T = (((mu_0)*3,14*(chi_2)*(frequency)*(magnetic_field_ quadrato))/(((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water)))*t ;

16 real source = ((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water))* T;;

17 face_t f;

Anyone can help me to fix it?

Thanks a lot

[KevinZ09]

Quick scan, so no sure if this is your only problem, but replace the "," by "." for decimals, i.e., write 3.14 instead of 3,14. There are a couple of occurences of this error.

[KaLium]

; instead of ;;

"real t = CURRENT_TIME" needs "; "