how defining the species ?
 

I used multiphase flow liquid liquid phase, Naphtha-water flow. Oxygen present in bulk (8ppm), chemical reaction occurred at the pipe walls acording to reaction{2Fe + 1.5 O2 + 3 H2O --- 2Fe(OH)3 }.In fluent: species panel contain selected species, selected site species and selected solid species, how applied this items on the above reactions. 3. how defining the species in the above locations. anyone help me.