[alihosseini63]

Hello all

I want to write udf for multiple reactions in FLUENT and I'm doing that based on the udf manual of ANSYS, but when I want to interpret the udf I face error.
when I want to interpret the udf, it says that "line 23: structure reference not implemented"
Can you please guide me to find what's wrong in my udf.
my udf is as below:

/************************************************** ********
rate.c
UDF for calculation the reaction rtaes in gasifier
************************************************** *********/

#include "udf.h"

#define K1 3300
#define K2 4500

DEFINE_VR_RATE(user_rate,c,t,r,mole_weight,species _mf,rate,rr_t)
{

real s1=species_mf[1];
real s2=species_mf[2];
real s0=species_mf[0];
real s4=species_mf[4];
real mw1=mole_weight[1];
real mw2=mole_weight[2];
real temp= C_T(c,t);
real p=C_P(c,t);

if (!strcmp(r->name, "reaction-1"))

{
*rate= K1*(s1)*(s2)/p/p*exp(-5000/temp);

*rr_t=*rate;
}

else if (!strcmp(r->name, "reaction-2"))
{
*rate= K2*(s0)*(s2)/p/p*exp(-5000/temp);

*rr_t=*rate;
}
}