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ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

Individual price:

$246.00 (Must be sent to your home address)

You can order single issue or individual article. To purchase a single issue or an individual article as well as to view tables of contents and abstracts click on issue number.

Institutional price:

$518.00

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For Online Access

Year 1995

• 1Radiative Transfer I
Proceedings of the First International Symposium on Radiation Transfer - Kusadasi, Turkey, August, 1995

800 pages

Volume price - $192.00

ACCURACY OF VARIOUS GAS IR RADIATIVE PROPERTY MODELS APPLIED TO RADIATIVE TRANSFER IN PLANAR MEDIA

Laurent Pierrot
Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, UPR 288 du CNRS et de l'ECP. Ecole Centrale Paris, 92295 Chatenay-Malabry Cedex, France

Anouar Soufiani
Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, UPR 288 du CNRS et de l'ECP. Ecole Centrale Paris, 92295 Chatenay-Malabry Cedex, France

Jean Taine
Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, UPR 288 du CNRS et de l'ECP. Ecole Centrale Paris, 92295 Châtenay-Malabry Cedex, France

ABSTRACT

The accuracy of different gas radiative property models is studied by comparing their results to a reference line-by-line approach for a planar geometry. The corresponding computational times are compared. The parameters of the four approximate models, i.e. correlated-k (CK), correlated-k fictitious gas (CKFG), statistical narrow-band (SNB) and weighted sum of gray gases (WSGG), have been obtained from the line-by-line approach using the same spectroscopic data base in order to study the intrinsic qualities of each model. The studied medium is a H₂O-N₂ mixture contained between two isothermal parallel walls. Results are discussed from different points of view: advantages of models expressed in terms of absorption coefficients, ability of models to treat wall reflection, optically thin and thick media, long-range sensing applications, etc. The WSGG model is less time consuming than other models, but is generally characterized by a poor accuracy. The other approximate models are characterized by accuracies depending on the considered conditions. The choice of a model for a given application is discussed.