[ENGRTAHIR]

I am studying micro combustion. I have two inlets and one outlet. The mixture consist of 25 species and 34 reaction.
the dimension of combustor is 100 mm length and 7 mm height (2D).
there is a porous medium in the middle of combustor of 10mm length.
the inlet velocity of fuel is 1.06 and inlet velocity of air is 0.40.
when i choose the mesh of 1mm, i get good results but when i reduce the mesh to 0.5mm, my results changed drastically.
Also if reduce the fuel velocity to three times, i get good results.

Anybody having the same problem. Kindly give me suggestion.