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Computational Thermal Sciences: An International Journal

Publication de 6  numéros par an

ISSN Imprimer: 1940-2503

ISSN En ligne: 1940-2554

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.5 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00017 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.279 SNIP: 0.544 CiteScore™:: 2.5 H-Index: 22

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ANALYSIS OF RADIATIVE TRANSFER IN BODY-FITTED AXISYMMETRIC GEOMETRIES WITH BAND MODELS AND ANISOTROPIC SCATTERING

Volume 11, Numéro 1-2, 2019, pp. 161-176
DOI: 10.1615/ComputThermalScien.2018021506
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RÉSUMÉ

The problem of radiation heat transfer in divergent nozzles and diffusers is of real practical importance. The correct estimation of the radiative heating at the walls of these enclosures requires appropriate treatment of the spectrally dependent properties of the participating medium like absorption and scattering, along with a handle on high temperature gradients. The present study aims to apply the spectral line-based weighted sum of gray gases (SLW) model (Denison and Webb, 1993b) to body-fitted axisymmetric geometries like truncated cone-type enclosures, which resemble gradually expanding diffusers, rocket exhaust nozzles, and typical industrial combustors that find wide engineering use. A modification of the discrete ordinates method (Baek and Kim, 1997b) has been employed to solve the radiative transfer equation. A mixture of three gases (viz. CO2, H2O, and CO) has been considered and its spectral behavior is modeled using the SLW band model. Different particle loadings are incorporated and anisotropic scattering is modeled using transport approximation (Dombrovsky, 2012). A general purpose code, SLDOM (discrete ordinates method with SLW model), has been developed to handle these complexities of the problem. After a rigorous validation, a detailed analysis of the radiative heat fluxes at the curved wall is made under the influence of variable gas and particle concentrations with high temperature gradients. The results obtained show a strong dependence of radiative heat fluxes on particle concentration. Among gases, H2O concentration was found more critical than other gases.

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