Premixed Combustion

IS

Once again I need help, this time in premixed combustion model. These are the questions that I have:

1) For the premixed combustion I am using the following models :

a) Radiation--->Rosseland

b) Energy

c) species-->Premixed

d) Viscous----> k-E

Do I need to switch on anything more?

2) My combustion chamber has inlet as (one) mass flow inlet and outlets are several pressure outlet.

--- My question is: if I set the progress variable (c)as zero in inlet and c=1 at outlet, do I need to specify the the inlet temperature as room temperature?

or

---- Should i set the progress variable as c=1 in inlet and c=1 in outlet and specify the inlet temperature above the ignition temperature of methane?

Please advice (as soon as you can) on this as I am confused and do not understand how fluent simulates the spark in combustion process.

Thanks;