How to use Eddy Dissipation rate only When using Finite rate/Eddy Dissipation model

Dziyad · February 19, 2014, 00:01

hello everybody i want simulate biomass gasification process. i have problem about first reaction. i want to create reaction vol --> aCO + bCO2 + cH2 + dC2H2. I want to set in Eddy Dissipation rate only. But in case, i am using Finite rate/Eddy Dissipation model for all reaction. How to use Eddy Dissipation rate only when using finite rate/Eddy dissipation model? Thank you very much

macfly · February 19, 2014, 09:10

In this model, the reaction rate is the smallest value between the Arrhenius and the eddy-dissipation reaction rates. Edit the parameters of the Arrhenius rate (e.g., pre-exponential factor = temperature exponent = 1e+30, activation energy = -1e+30) so that it is very high, and therefore never the smallest value.

Dziyad · February 19, 2014, 18:25

Thank you very much for the answer, macfly. It works

February 19, 2014, 00:01	How to use Eddy Dissipation rate only When using Finite rate/Eddy Dissipation model	#1
Dziyad New Member Dziyad Dzulfansyah Join Date: Jan 2014 Location: Bogor Posts: 11 Rep Power: 13	hello everybody i want simulate biomass gasification process. i have problem about first reaction. i want to create reaction vol --> aCO + bCO2 + cH2 + dC2H2. I want to set in Eddy Dissipation rate only. But in case, i am using Finite rate/Eddy Dissipation model for all reaction. How to use Eddy Dissipation rate only when using finite rate/Eddy dissipation model? Thank you very much

February 19, 2014, 09:10		#2
macfly Senior Member François Grégoire Join Date: Jan 2010 Location: Canada Posts: 392 Rep Power: 18	In this model, the reaction rate is the smallest value between the Arrhenius and the eddy-dissipation reaction rates. Edit the parameters of the Arrhenius rate (e.g., pre-exponential factor = temperature exponent = 1e+30, activation energy = -1e+30) so that it is very high, and therefore never the smallest value. Last edited by macfly; February 19, 2014 at 18:31.

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February 19, 2014, 18:25		#3
Dziyad New Member Dziyad Dzulfansyah Join Date: Jan 2014 Location: Bogor Posts: 11 Rep Power: 13	Thank you very much for the answer, macfly. It works