Learning Forum

[MIHIR DUTTA]

During my work with UDF , i didn't understand about using C_R(c,t). Can anyone please texplain about it?

#include"udf.h"
DEFINE_VR_RATE(vol_reac_rate,c,t,r,wk,yk,rate,rr_t)
{
real ci, prod;
int i;
/* Calculate Arrhenius reaction rate */
prod = 1.;
for(i = 0; i < r->n_reactants; i++)
{
ci = C_R(c,t) * yk[r->reactant[i]] / wk[r->reactant[i]];
prod *= pow(ci, r->exp_reactant[i]);
}
*rate = r->A * exp(- r->E / (UNIVERSAL_GAS_CONSTANT * C_T(c,t))) *
pow(C_T(c,t), r->b) * prod;
*rr_t = *rate;
/* No "return..;" value. */
}

[Rob]

There's a very useful document with Fluent, but it's rarely looked at. Click on Help and then paste https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_udf/flu_udf_info.html into the browser.