How DO radiation model deal with fluid species radiation?

- December 2, 2020 at 8:11 am
  
  Weiqiang Liu
  Subscriber
  
  Hi all,I am using DO model in fluent to consider radiation effects of a reactor. I checked participates in radiation in cell zone conditions panel which meanes I considere fluid media as particupating in radiation in my model. nThe fuel in my model is methane air mixture and it's a multi-component system which imports chemkin mechanisms. In the Materials panel, I have to set absorption coefficient, scattering coefficient and refractive index for mixture materials.nMy confusion is:how can I set up these coefficients? If the fuel is composed by methane and air mixture, then the set up of these coefficients is based on what kind of species in the system? Are there any basic rules for this?nCan anybody give me some suggestions?nBest regardsnweiqiangn
- December 2, 2020 at 10:51 am
  
  Rob
  Forum Moderator
  
  They're a material property, so the gas will absorb/refract etc based on the composition. n
- December 2, 2020 at 10:54 am
  
  Weiqiang Liu
  Subscriber
  
  They're a material property, so the gas will absorb/refract etc based on the composition.https://forum.ansys.com/discussion/comment/99010#Comment_99010
  Hi Rob,nDo you know some experience formula which I can follow to estimate these coefficients of methane/air mixture?nBest regardsn
- December 2, 2020 at 11:00 am
  
  DrAmine
  Ansys Employee
  
  Check in the help for Radiation in Combusting Flowsn
- December 3, 2020 at 1:52 pm
  
  Weiqiang Liu
  Subscriber
  
  Check in the help for Radiation in Combusting Flowshttps://forum.ansys.com/discussion/comment/99013#Comment_99013
  Dr. Amine,nThanks for your advice.nbest regardsnweiqiangn

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