[Kashif Rashid]

I have written UDF in C, using fluent macro, “DEFINE_SOURCE”, for internal steam reforming (file attached). Reforming reactions are supposed to take place inside porous anode electrode of Fuel Cell. Pre-reformed fuel mixture is used which consist of (CH4, H2, H2O, CO, CO2) species. 6 source terms are generated (5 from species, 1 from heat sink, as steam reforming is an endothermic reaction). These source terms are hooked in "Cell Zone Conditions" of fluent. UDMI, memories in Fluent are also allocated to store data for above terms (see code file).
After doing all these things and running simulation, reactions are not taking place; there is no change in concentration of species at inlet and outlet. Can someone take a look on UDF and suggest me what i am doing wrong? Heat is being provided outside the porous anode to facilitate the endothermic reaction.
In the next step I shall include electrochemical reactions in this UDF taking place at the surface of anode, which are exothermic. Reforming reaction reactions will use this heat.