Flow rate @ Outlet is higher than @Inlet

tanaji · October 30, 2011, 14:54

Dear All,

I am doing Flare simulation and for that I am using Fluent EDC model.

when I am checking flow rate of fuel sepcies at Inlet is less than flow rate of that species at outlet. There is element mass balance error.

How should I overcome this problem.
Please suggest me

Thank you

Laci · October 30, 2011, 15:09

You have species or element mass inbalance. These are not the same.
Don't forget to take into account, that chemical reactions in a domain can be sink or source of species.

tanaji · October 30, 2011, 23:29

thank you for your reply.
1. i am talking about element mass imbalance.
2. my fuel is c3h6.. the flame is generated still the c3h6 @ outlet is more than inlet....
this is the first time i am facing such type of problems

please suggest

Laci · November 2, 2011, 06:11

Could you send more detail?
- the reaction is one step or detailed with further reactions?
- temperature?
- reaction model/turbulence model?

October 30, 2011, 14:54	Flow rate @ Outlet is higher than @Inlet	#1
tanaji New Member Tanaji Join Date: Sep 2010 Location: Texas Usa Posts: 11 Rep Power: 15	Dear All, I am doing Flare simulation and for that I am using Fluent EDC model. when I am checking flow rate of fuel sepcies at Inlet is less than flow rate of that species at outlet. There is element mass balance error. How should I overcome this problem. Please suggest me Thank you

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October 30, 2011, 15:09		#2
Laci Member anonym Join Date: Mar 2009 Posts: 65 Rep Power: 17	You have species or element mass inbalance. These are not the same. Don't forget to take into account, that chemical reactions in a domain can be sink or source of species.

October 30, 2011, 23:29		#3
tanaji New Member Tanaji Join Date: Sep 2010 Location: Texas Usa Posts: 11 Rep Power: 15	thank you for your reply. 1. i am talking about element mass imbalance. 2. my fuel is c3h6.. the flame is generated still the c3h6 @ outlet is more than inlet.... this is the first time i am facing such type of problems please suggest

November 2, 2011, 06:11		#4
Laci Member anonym Join Date: Mar 2009 Posts: 65 Rep Power: 17	Could you send more detail? - the reaction is one step or detailed with further reactions? - temperature? - reaction model/turbulence model?