help me plz, mixing model
 

hi, i'm not good at english, so please understand me
we are using fluent for assignment
the model is mixing in the pipe (PFR)
a +b -> c + d
we did everything, but couldn't display exact solution
maybe the problem is setting the boundary codtion....

a inlet - mass flux inlet
b inlet - mass flux inlet
outlet - pressure outlet

the mass flux of a,b is 10 kg/m2.s (?)
anyway

please tell me
should we change the value of x,y,z direction
and.....temperature, and pressure

we dont know all of pressure

and we know a,b inlet temperature

how should we set the value of the outlet temperature

we don't know outlet temp.