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How to modify Arrhenius rate parameters in Fluent ??

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Old   October 25, 2016, 21:59
Question How to modify Arrhenius rate parameters in Fluent ??
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Kashif Rashid
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I am simulating pulverized coal combustion using eddy-dissipation model (Turbulence-Chemistry Interaction). I have specified few reactions with their default Arrhenius rate parameters like (pre-exponential factor, activation energy etc.). The temperature that I am getting at the outlet of the burner is at least 300-400 K higher than what I am getting in the experimental setup, DO radiation model is also activated with all other 2nd order upwind. I read papers regarding this case in which they mentioned different Arrhenius rate parameters. I want to incorporate these parameters in my simulation instead of default values. But the problem is that Arrhenius rate parameters are not visible anymore, I can't change them further, only mixing rate is visible. Please guide how to modify these "Arrhenius rate parameters" . Figure is attached for the understanding of my problem.
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