I am doing fire simulation using species transport(volumetric heat source)in Fluent.I have selected methane-air mixture for this case.Can any one tell me that how the mass fraction is assigned?Is this air-methane mixture is suitable for predicting CO and fire somkeor any other mixture is better than this? I know CO in mg/m3, how to give it in terms of mass fraction?
Again heat release rate should be 2MW.Is it needed to assign HRR at the walls?
thnx in advance,
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