[shockguy]

I wanted to mix two gases in a closed cylinder(2D problem) to form a uniform mixture. For that I've created mesh in ICEM CFD with two zones.
In fluent selected Energy Equation, Viscous Turbulence k-epsilon and Species Transport Models. In Materials added the two gases and assigned them to each zones with cell zone conditions. After giving boundary conditions(fixed wall and interior) initialization is done. But when I check the species concentration contours the mass fraction of eazh gas is shown as zero (attached the image). Is there anything else I've to do before initialization.