Learning Forum

[2018ugme092]

Hii everyone,

I am working on simulation of fuel reactor of chemical looping combustion from this paper

deng2008.pdf

[Rahul Kumar]

Hello,
Please refer to this section on writing a UDF : Fluent Customization Manual (ansys.com)
If you have any specific questions or you want to know how to circumvent an error message, let us know and we can assist you.

[2018ugme092]

This is the UDF I wrote and its working fine for me:
# include "udf.h"

#define R 8.31434 /*Universal Gas Constant*/
# define Pre 4300 /*Pre-exponential factor, 1/s-kPa*/
# define E1 151000 /*Activation Energy, J/mol*/
# define rho_caso4 21764 /*Molar density of CaSO4, kgmol/m3*/ //TO CHECK ----> Correct I think

DEFINE_HET_RXN_RATE(deng_rxn_rate,c,t,r,mw,yi,rr,rr_t)
{
Thread **pt = THREAD_SUB_THREADS(t);
Thread *prim_t = pt[0]; /*Thread for primary Phase*/
Thread *sec_t = pt[1]; /*Thread for secondary Phase*/
real T_SEC = C_T(c,sec_t); /*Phase secondary temperature, K*/
real T_PRIM = C_T(c,prim_t);
real pp_h2 = (C_R(c,prim_t) * R * T_PRIM)/2.0;
*rr = rho_caso4* pp_h2 *Pre*(exp((-E1/(R*T_SEC))));
}