the differences between Radiation Temperature and Static Temperature

ustbdynamic · January 9, 2022, 11:07

Hello Everyone,

I am simulating a radiation problem using P1 model. It is found that there are two Temperatures listed in the Contours. One is Radiation Temperature, the other is Static Temperature. Though the contours depicted, no relationship was found between them.

So what is the difference between them?

and the incident radiation G is calculated by which one of the following:
4. * SIGMA_SBC*pow(Radiation Temperature, 4), or
4. * SIGMA_SBC*pow(Static Temperature, 4).

Thank you

LuckyTran · January 9, 2022, 18:57

Radiation temperature is calculated from G via the inverse of the relation you wrote.

ustbdynamic · January 9, 2022, 21:45

Thank you LuckyTran.
That is to say the radiation temperature is just a characterization of radiation intensity.
For example, the local higher Static Temperature does not mean having a high radiation flux. But the local higher Radiation Temperature indicates there must be a high local radiation heat flux.

I don't know if I understand correctly.

January 9, 2022, 11:07	the differences between Radiation Temperature and Static Temperature	#1
ustbdynamic Member xingangzheng Join Date: Jul 2009 Posts: 41 Rep Power: 18	Hello Everyone, I am simulating a radiation problem using P1 model. It is found that there are two Temperatures listed in the Contours. One is Radiation Temperature, the other is Static Temperature. Though the contours depicted, no relationship was found between them. So what is the difference between them? and the incident radiation G is calculated by which one of the following: 4. * SIGMA_SBCpow(Radiation Temperature, 4), or 4. SIGMA_SBC*pow(Static Temperature, 4). Thank you

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January 9, 2022, 18:57		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,845 Rep Power: 68	Radiation temperature is calculated from G via the inverse of the relation you wrote.

January 9, 2022, 21:45		#3
ustbdynamic Member xingangzheng Join Date: Jul 2009 Posts: 41 Rep Power: 18	Thank you LuckyTran. That is to say the radiation temperature is just a characterization of radiation intensity. For example, the local higher Static Temperature does not mean having a high radiation flux. But the local higher Radiation Temperature indicates there must be a high local radiation heat flux. I don't know if I understand correctly.