Adiabatic Temperature rise

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Hello

My adiabatic temperature, which I calculated using the following formula: T_ad= T_0(1+((-Hrxn)C_A0/(rhoC_pT_0))), where T_ad= adiabatic temperature rise, Hrxn=enthalpy of reaction, C_A0= concentration of limiting reactant, rho= density of the fluid, C_p=heat capacity of the fluid, T_0=initial temperature of the system.

My T_ad came to be 6000 K, but my COMSOL model is showing the highest T_ad to be 1200 K. How do I fix this problem?

I will sincerely appreciate any help regarding this matter.


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