Model of radiation

NiBa · November 18, 2014, 09:33

which model of radiation is appropriate to use when i have a combustor with two inlets (fuel and air) and a separate inlet of water that turns from water liquid to water vapor?
thank you

LuckyTran · November 19, 2014, 00:05

If I recall correctly, a high water vapor at high temperature is a participating medium and highly spectral. If the water vapor concentration is high, you may want to consider taking that into account.

For non-gray radiation (spectral radiation) use P-1 model or DO model. Rooseland has some similarities to P-1 but doesn't work in parallel. DO model is the best model that Fluent offers.

The S2S model cannot be used for participating media.

If you don't want participating media, all the models are fairly viable. DTRM, S2S, and DO models are basically ray tracing models and P-1, Rosseland solve transport equations.

lucar4980 · November 20, 2014, 17:48

Usually I used DO model for radiative problem with combustion. It is also widely employed in the industry in such situations.

November 18, 2014, 09:33	Model of radiation	#1
NiBa Member Nikolaos Babilas Join Date: Nov 2014 Posts: 37 Rep Power: 13	which model of radiation is appropriate to use when i have a combustor with two inlets (fuel and air) and a separate inlet of water that turns from water liquid to water vapor? thank you

November 20, 2014, 17:48		#3
lucar4980 New Member Join Date: Oct 2012 Location: Italy Posts: 17 Rep Power: 15	Usually I used DO model for radiative problem with combustion. It is also widely employed in the industry in such situations. __________________ Advanced Mechanical Design CAE solutions specialist numerical.it

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November 19, 2014, 00:05		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,836 Rep Power: 68	If I recall correctly, a high water vapor at high temperature is a participating medium and highly spectral. If the water vapor concentration is high, you may want to consider taking that into account. For non-gray radiation (spectral radiation) use P-1 model or DO model. Rooseland has some similarities to P-1 but doesn't work in parallel. DO model is the best model that Fluent offers. The S2S model cannot be used for participating media. If you don't want participating media, all the models are fairly viable. DTRM, S2S, and DO models are basically ray tracing models and P-1, Rosseland solve transport equations.