[Avengermaster]

I need some urgent help . I have been simulating the steam cracking furnace from certain papers namely
1.) CFD simulations of steam cracking furnaces using detailed combustion mechanisms
2.) Impact of radiation models in CFD simulations of steam cracking furnaces.
In both these papers furnace geometry, reaction, composition of the fuel and the models applied are similar. But in both these papers , the maximum flame temperature was achieved at the height of 1.5m . But when I try to simulate these papers using the same flow , combustion , turbulence model in the ANSYS fluent , same as that of the papers my maximum flame temperature reaches at 2.1 m and has a longer flame when compared to those above paper. Can someone please help me why this is happening even though I have applied the same case as that of papers