Finite-Rate/Eddy-Dissipation problem

a_cucen · June 16, 2014, 07:23

I' m trying to simulate combustion with Finite-Rate/Eddy-Dissipation model. I have 7 reactions and I want to choose only eddy dissipation at one of the reactions. How can I do that?

Regards

a_cucen · June 18, 2014, 02:24

Problem solved

Tleja · April 9, 2015, 11:20

I am setting up a very simple case.

My reaction is shown as below:

CH4 + 2O2 ----k----> CO2 + 2H2O

Pre-Ex 2.119e11
Ea 2.027e5 unit j/mol

First I chose Finite-Rate/Eddy-Dissipation as my combustion model, there is no combustion at all even after I initialized my case with 2000K!

Later I only use Eddy Dissipation model, then the combustion comes.

Actually,I need to include the effect of Arhenius law and turbulent into my reaction model.

Do you know why I can't use the first model?
How should i do?

Regard
Tleja

a_cucen · April 9, 2015, 11:54

Hi. maybe your arrhenius values are wrong. where did you get these values?

June 16, 2014, 07:23	Finite-Rate/Eddy-Dissipation problem	#1
a_cucen Member Ahmet Join Date: Mar 2011 Location: Ankara/ Turkey Posts: 37 Rep Power: 15	I' m trying to simulate combustion with Finite-Rate/Eddy-Dissipation model. I have 7 reactions and I want to choose only eddy dissipation at one of the reactions. How can I do that? Regards

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
combustion problem	mcnair	CFX	9	March 22, 2011 14:06
Can I solve this problem by Fluent?	Kai_kc	FLUENT	1	October 27, 2010 05:29
CFX12 rif errors	romance	CFX	4	October 26, 2009 13:41
Finite volumes vs. finite elements: applications	Lionel S.	Main CFD Forum	10	January 22, 2007 10:51
Problem with Dissipation rate storage in UDMI	Sam	FLUENT	0	January 26, 2006 05:19

June 18, 2014, 02:24		#2
a_cucen Member Ahmet Join Date: Mar 2011 Location: Ankara/ Turkey Posts: 37 Rep Power: 15	Problem solved

April 9, 2015, 11:20		#3
Tleja Member Tleja Join Date: Sep 2013 Posts: 40 Rep Power: 12	I am setting up a very simple case. My reaction is shown as below: CH4 + 2O2 ----k----> CO2 + 2H2O Pre-Ex 2.119e11 Ea 2.027e5 unit j/mol First I chose Finite-Rate/Eddy-Dissipation as my combustion model, there is no combustion at all even after I initialized my case with 2000K! Later I only use Eddy Dissipation model, then the combustion comes. Actually,I need to include the effect of Arhenius law and turbulent into my reaction model. Do you know why I can't use the first model? How should i do? Regard Tleja

April 9, 2015, 11:54		#4
a_cucen Member Ahmet Join Date: Mar 2011 Location: Ankara/ Turkey Posts: 37 Rep Power: 15	Hi. maybe your arrhenius values are wrong. where did you get these values?