Rosseland radiation model

nima.shirani · August 16, 2018, 04:06

I have to simulate a cavity with Effects of non-linear thermal radiation which is Applying Rosseland approximation in the paper that I ve worked.
I want to know in the fluent how can I set up Rosseland ?( I know its on radiation models in models tab,but I wana know where I have to set radiation parameter for example I should simulate with Rd=1 at first and after that another one).
and second question,what is non-linear thermal radiation? I suppose generaly radiation is a non-linear but in this paper mantion that ( dose it have a specific setting up in fluent? )

thanks for your time

LuckyTran · August 16, 2018, 15:59

The momentum and energy equations are already non-linear in velocity.

You have to consult the paper or author of the paper. It's not clear what non-linear thermal radiation means. Or for that matter, what is linear thermal radiation? And linear/non-linear with respect to what?

nima.shirani · August 17, 2018, 01:00

thanks for Your attention , but do you know how can i use Rosseland setup?

August 16, 2018, 04:06	Rosseland radiation model	#1
nima.shirani New Member nima shirani Join Date: May 2018 Posts: 3 Rep Power: 7	I have to simulate a cavity with Effects of non-linear thermal radiation which is Applying Rosseland approximation in the paper that I ve worked. I want to know in the fluent how can I set up Rosseland ?( I know its on radiation models in models tab,but I wana know where I have to set radiation parameter for example I should simulate with Rd=1 at first and after that another one). and second question,what is non-linear thermal radiation? I suppose generaly radiation is a non-linear but in this paper mantion that ( dose it have a specific setting up in fluent? ) thanks for your time

August 16, 2018, 15:59		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	The momentum and energy equations are already non-linear in velocity. You have to consult the paper or author of the paper. It's not clear what non-linear thermal radiation means. Or for that matter, what is linear thermal radiation? And linear/non-linear with respect to what? nima.shirani likes this.

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August 17, 2018, 01:00		#3
nima.shirani New Member nima shirani Join Date: May 2018 Posts: 3 Rep Power: 7	thanks for Your attention , but do you know how can i use Rosseland setup?