# simplified flame?!

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August 5, 2013, 10:53
simplified flame?!
#1
New Member

stefan
Join Date: Jul 2012
Posts: 11
Rep Power: 6
Hi!

Is it possible to simulate a simplified flame?!

Attached is a picture.. like the "burner" works.

Is there a possibility to simulate this?!

thank you!
Attached Images
 flame.JPG (33.9 KB, 8 views)

 August 5, 2013, 18:29 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,721 Rep Power: 99 You could model a flame as a simple heat source. But it depends on what you are trying to model - if just the heat then this approach is fine, but if you want accurate temperatures, species or flame shapes you will need a more sophisticated approach.

 August 6, 2013, 02:06 #3 New Member   stefan Join Date: Jul 2012 Posts: 11 Rep Power: 6 Ok, thank you. Yes, it should be a simple heat source... With a temperature, heat transfer coeff. Is that possible? How can I create it? Insert the "flame" as seperate body? As inlet (maybe a gas with thermal radiation)? thanks!

 August 6, 2013, 19:09 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 12,721 Rep Power: 99 No, I think you misunderstand what a source term is. A source term is an additional bit on the end of the equation where you can add or subtract "stuff". So in this case I suspect you probably know the amount or rate of fuel being added, so you know the heat input. So I would then use a total energy source term, with units of Watts to add the amount of heat the combustion would add to the domain. This approach would accurately model the global conservation of heat as the correct amount of heat is being added, but the detailed flow around the fire would not be correct as you are not modelling the details of the flame. But if the details of the flame are not important then this approach is fine.

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