Spectral module for photon Monte Carlo calculations in hypersonic nonequilibrium radiation / Takashi Ozawa in Journal of heat transfer, Vol. 132 N° 2 (n° spécial) (Fevrier 2010)  

Public ISBD [article]  inJournal of heat transfer > Vol. 132 N° 2 (n° spécial) (Fevrier 2010) . - pp. [023406-1/8] Titre : Spectral module for photon Monte Carlo calculations in hypersonic nonequilibrium radiation Type de document : texte imprimé Auteurs : Takashi Ozawa, Auteur ; Michael F. Modest, Auteur ; Deborah A. Levin, Auteur Article en page(s) : pp. [023406-1/8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Monte Carlo methods Nonequilibrium Radiation QSS Hypersonic flow Absorption coefficients Flow simulation Molecular electronic states Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this paper, efficient spectral modules and random number databases are developed for atomic and diatomic species for use in photon Monte Carlo (PMC) modeling of hypersonic nonequilibrium flow radiation. To model nonequilibrium flow conditions, the quasisteady state assumption was used to generate electronic state populations of atomic and diatomic gas species in the databases. For atomic species (N and O), both bound-bound transitions and continuum radiation were included and were separately databased as a function of electron temperature and number density as well as the ratio of atomic ion to neutral number density. For the radiating diatomic species of N2+, N2, O2, and NO databases were generated for each electronic molecular electronic system. In each molecular electronic system, the rovibrational transition lines were separately databased for each electronic upper state population forming the electronic system. The spectral module for the PMC method was optimized toward computational efficiency for emission calculations, wavelength selections of photon bundles and absorption coefficient calculations in the ray tracing scheme. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Spectral module for photon Monte Carlo calculations in hypersonic nonequilibrium radiation [texte imprimé] / Takashi Ozawa, Auteur ; Michael F. Modest, Auteur ; Deborah A. Levin, Auteur . - pp. [023406-1/8]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 2 (n° spécial) (Fevrier 2010) . - pp. [023406-1/8] Mots-clés : Monte Carlo methods Nonequilibrium Radiation QSS Hypersonic flow Absorption coefficients Flow simulation Molecular electronic states Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this paper, efficient spectral modules and random number databases are developed for atomic and diatomic species for use in photon Monte Carlo (PMC) modeling of hypersonic nonequilibrium flow radiation. To model nonequilibrium flow conditions, the quasisteady state assumption was used to generate electronic state populations of atomic and diatomic gas species in the databases. For atomic species (N and O), both bound-bound transitions and continuum radiation were included and were separately databased as a function of electron temperature and number density as well as the ratio of atomic ion to neutral number density. For the radiating diatomic species of N2+, N2, O2, and NO databases were generated for each electronic molecular electronic system. In each molecular electronic system, the rovibrational transition lines were separately databased for each electronic upper state population forming the electronic system. The spectral module for the PMC method was optimized toward computational efficiency for emission calculations, wavelength selections of photon bundles and absorption coefficient calculations in the ray tracing scheme. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]

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