Assessment of SLW model in 3D non-gray gas radiation calculation

Darbandi, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.11159/ffhmt19.132
  3. Publisher: Avestia Publishing , 2019
  4. Abstract:
  5. In this paper, the radiation heat transfer is calculated numerically in a three dimensional enclosure containing non-gray gases. The radiation heat transfer equation is solved using the finite-volume formulation of discrete ordinate method and the SLW model is employed to calculate the radiation absorption coefficients. Three cases are simulated here including the isothermal/homogeneous, isothermal/nonhomogeneous, and the non-isothermal/homogeneous media. The calculated radiation source terms and the wall heat fluxes are compared with the results of SNB method. It is shown that the SLW results are in very good agreement with the SNB in case of isothermal/homogeneous. In the two other cases, the SLW results show more deviations than this one. It is because the SLW formulation employs more additional assumptions to calculate the radiation in media with non-uniform distribution of temperature or mixture composition and multicomponent gas mixture. However, comparing the results of SLW with those of the WSGG model, it indicates that the former case would be more accurate. This is because the parameters of SLW model are calculated directly from the high resolution spectroscopic database of gas molecules. © 2019, Avestia Publishing
  6. Keywords:
  7. Radiation absorption coefficient ; Radiation heat transfer ; SLW model ; Spectral radiation
  8. Source: 6th International Conference on Fluid Flow, Heat and Mass Transfer, FFHMT 2019, 18 June 2019 through 19 June 2019 ; 2019 ; 23693029 (ISSN); 9781927877593 (ISBN)
  9. URL: https://avestia.com/FFHMT2019_Proceedings/files/paper/FFHMT_132.pdf