Fluent: Combustion with Heat Transfer

Tamoor · April 30, 2019, 22:20

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, 09:36

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, 22:20	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.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Heat transfer between wall and air in Fluent	jimmy871013	FLUENT	6	April 27, 2018 03:00
Why Fluent give me wrong heat transfer coefficient?	mariam.sara	FLUENT	10	July 28, 2015 12:28
Separate Convective and Radiative heat transfer in CFD post using fluent as a solver	Lemanes	FLUENT	1	July 6, 2015 11:31
Problem with conjugate heat transfer in Fluent	JianT88	FLUENT	0	March 16, 2015 09:17
Difficulty In Setting Boundary Conditions	Moinul Haque	CFX	4	November 25, 2014 18:30

December 4, 2019, 09:36		#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