DO radiation

Laci · February 3, 2010, 10:40

Hy everybody.

I am simulating reacting flow (gas phase) through a chamber. The reaction is highly exothermic and the walls of the chamber are watercooled.
I use DO radiation model. I am little bit confused about the coefficient.

How much should I set for the coefficients and where?

Should I set the Boundary Conditions/Wall/Thermal/Radiation. Here I can set the temperature but what else? And how much are these?
And/Or...
What should I set at the Materials/"my solid media" panel. There is also absorption and refractive index and so on. These coefficients also exist on the flowing material option.
What should I set and where can I get these coefficient for my materials?
Thanks in advance,
Laci

hook · February 4, 2010, 00:00

Other parameters should be determined due to your material, such as absorption coefficient, scatering coefficient and refractive index. Maybe you could go to see the FLUENT help documents.
Best Wishes.

Laci · February 4, 2010, 04:06

Quote:

Originally Posted by hook

Other parameters should be determined due to your material, such as absorption coefficient, scatering coefficient and refractive index. Maybe you could go to see the FLUENT help documents.
Best Wishes.

Thank you very much for your reply.
I figured out what I should adjust. Could you or anybody else send me a source for absorption coefficients?
Thanks in advance,
Laci

February 3, 2010, 10:40	DO radiation	#1
Laci Member anonym Join Date: Mar 2009 Posts: 65 Rep Power: 17	Hy everybody. I am simulating reacting flow (gas phase) through a chamber. The reaction is highly exothermic and the walls of the chamber are watercooled. I use DO radiation model. I am little bit confused about the coefficient. How much should I set for the coefficients and where? Should I set the Boundary Conditions/Wall/Thermal/Radiation. Here I can set the temperature but what else? And how much are these? And/Or... What should I set at the Materials/"my solid media" panel. There is also absorption and refractive index and so on. These coefficients also exist on the flowing material option. What should I set and where can I get these coefficient for my materials? Thanks in advance, Laci

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February 4, 2010, 00:00		#2
hook New Member Join Date: Jan 2010 Posts: 7 Rep Power: 16	Other parameters should be determined due to your material, such as absorption coefficient, scatering coefficient and refractive index. Maybe you could go to see the FLUENT help documents. Best Wishes.