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Old   July 24, 2013, 06:59
Default greyMeanAbsorptionEmission
  #1
mgc
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Maria
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Hi all,

Could anyone tell me a book/paper/reference where to find the species polynomial coefficients required to calculate the absorptivity coefficient according to the "greyMeanAbsorptionEmission" model?

In other words, does anybody know where following coefficients come from?

************************************************** ****************************
CO2
{
Tcommon 300; //Common Temp
invTemp true; //Is the polynomio using inverse temperature.
Tlow 200; //Low Temp
Thigh 2500; //High Temp

loTcoeffs //coefss for T < Tcommon
(
0 // a0 +
0 // a1*T +
0 // a2*T^(+/-)2 +
0 // a3*T^(+/-)3 +
0 // a4*T^(+/-)4 +
0 // a5*T^(+/-)5 +
);
hiTcoeffs //coefss for T > Tcommon
(
18.741
-121.31e3
273.5e6
-194.05e9
56.31e12
-5.8169e15
);

}
************************************************** ****************************

Thanks
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Old   February 4, 2018, 16:33
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Sadegh Ebadi
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Quote:
Originally Posted by mgc View Post
Hi all,

Could anyone tell me a book/paper/reference where to find the species polynomial coefficients required to calculate the absorptivity coefficient according to the "greyMeanAbsorptionEmission" model?

In other words, does anybody know where following coefficients come from?

************************************************** ****************************
CO2
{
Tcommon 300; //Common Temp
invTemp true; //Is the polynomio using inverse temperature.
Tlow 200; //Low Temp
Thigh 2500; //High Temp

loTcoeffs //coefss for T < Tcommon
(
0 // a0 +
0 // a1*T +
0 // a2*T^(+/-)2 +
0 // a3*T^(+/-)3 +
0 // a4*T^(+/-)4 +
0 // a5*T^(+/-)5 +
);
hiTcoeffs //coefss for T > Tcommon
(
18.741
-121.31e3
273.5e6
-194.05e9
56.31e12
-5.8169e15
);

}
************************************************** ****************************

Thanks
Hello,
look at here:
http://www.sandia.gov/TNF/radiation.html
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Old   February 25, 2022, 21:56
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  #3
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Yingdong
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Quote:
Originally Posted by omid20110 View Post
Unfortunately, the website has expired. Can you provide the latest website? I'm really looking forward to it
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Old   April 19, 2023, 03:52
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Quote:
Originally Posted by yingdong View Post
Unfortunately, the website has expired. Can you provide the latest website? I'm really looking forward to it
It probably won't help you anymore, but maybe it will help someone else.

An archived version of the website can be found here: https://web.archive.org/web/20180716...radiation.html
The model is also briefly described in "R. S. Barlow, A. N. Karpetis, J. H. Frank, and J. -Y. Chen. Scalar profiles and NO formation in laminar opposed-flow partially premixed methane/air flames. Combustion and Flame, 127, pp. 21022118, 2001." (https://doi.org/10.1016/S0010-2180(01)00313-3).
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