Fluent: Combustion with Heat Transfer

Tamoor · April 30, 2019, 21:20

Hello!

I am modelling gaseous combustion in fluent using Eddy dissipation and k-epsilon models. I have species profiles (CO,CO2,H2O,O2,CH4) at inlet which I implement using UDF. I am only modelling fluid domain but I want to reject heat from the fluid domain into surroundings (which is used for steam production). I want to remove 13MW of heat from walls and I am trying to use heat flux boundary condition at walls. But I get negative temperatures at walls when I put (negative heat flux) calculated by 13MW/wall surface area. There is enough heat available at outlet of geometry (54MW) which I can see from Flux reports. But I want the 13MW to be removed from walls, any help would be really appreciated.

Rahand · December 4, 2019, 08:36

Hey Tamoor

could you get an answer to your problem or anyone knows, if it is possible to simulate combustion & heat transfer (conjugate heat transfer)?
Thx

April 30, 2019, 21:20	Fluent: Combustion with Heat Transfer	#1
Tamoor New Member Tamoor Join Date: Apr 2019 Posts: 1 Rep Power: 0	Hello! I am modelling gaseous combustion in fluent using Eddy dissipation and k-epsilon models. I have species profiles (CO,CO2,H2O,O2,CH4) at inlet which I implement using UDF. I am only modelling fluid domain but I want to reject heat from the fluid domain into surroundings (which is used for steam production). I want to remove 13MW of heat from walls and I am trying to use heat flux boundary condition at walls. But I get negative temperatures at walls when I put (negative heat flux) calculated by 13MW/wall surface area. There is enough heat available at outlet of geometry (54MW) which I can see from Flux reports. But I want the 13MW to be removed from walls, any help would be really appreciated.

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December 4, 2019, 08:36		#2
Rahand New Member Rahand Join Date: Mar 2016 Posts: 10 Rep Power: 10	Hey Tamoor could you get an answer to your problem or anyone knows, if it is possible to simulate combustion & heat transfer (conjugate heat transfer)? Thx