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Old   April 11, 2013, 02:47
Lightbulb surface reaction UDF
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hey!i am modelling the surface reaction,the overal reaction equation:2O3 -> 3O2. and its reaction rate formular is: r = K*b*O3/(1+b*O3); my UDF code as follows:
#include "udf.h"
#define K 6.8586e-11
#define b 15296.9e3
Thread *t0 = t->t0;
cell_t c0 = F_C0(f,t);
real o3 = yi[0];
real rho_w = 1.0, T_w = 300.0;
T_w = F_T(f,t);
rho_w = C_R(c0,t0)*C_T(c0,t0)/T_w;
o3 *=rho_w/mw[0];
*rr = K*b*o3/(1+b*o3);

the problem is:after compile and hook the UDF,the calcucation results showed that the reaction rate on the defined surface was zero。is there anyone who can help me analyse where the problem is and how to solve it? thanks!
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Old   January 7, 2014, 15:52
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Good afternoon, excuse me, did you find a solution to your problem? I’m experiencing the same; I would appreciate greatly your help.
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