ON THE COMPROMISE BETWEEN ACCURACY AND COMPUTATIONAL COST FOR DIFFERENT GLOBAL SPECTRAL MODELS

Soroush Rashidzadeh, Guilherme C. Fraga*, Hadi Bordbar, Simo Hostikka

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

Abstrakti

This paper presents an analysis of the performance of the three most common global spectral models for gas radiation, the weighted-sum-of-gray-gases (WSGG), the spectral line-based WSGG (SLW), and the full-spectrum k-distribution (FSK) models, when applied with the same number J of gray gases or quadrature nodes. The main purpose of the work is to assess and compare the accuracy of these models at a same level of computational cost. Values of J = 3 to J = 8 are considered. Decoupled, one-dimensional calculations on a purely H2O participating medium are carried out, with the line-by-line (LBL) method serving as the reference. The rank-correlated approach is used for the SLW and FSK models, and new correlations based on a high-resolution database are generated for the WSGG model. Of the three models, the WSGG generally performs the worst, and the FSK, the best, even for J = 3. For this smallest J, the SLW model yields very large errors, but starting from J = 4 its accuracy is comparable to that of the FSK model. Increasing J tends to reduce the errors of these two models, but it has no effect on the WSGG model for J > 4.

AlkuperäiskieliEnglanti
OtsikkoProceedings of the 10th International Symposium on Radiative Transfer, RAD 2023
KustantajaBegell House
Sivut19-26
Sivumäärä8
ISBN (elektroninen)978-1-56700-531-8
DOI - pysyväislinkit
TilaJulkaistu - 2023
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Symposium on Radiative Transfer - Thessaloniki, Kreikka
Kesto: 12 kesäk. 202316 kesäk. 2023
Konferenssinumero: 10

Julkaisusarja

NimiProceedings of the International Symposium on Radiative Transfer
Vuosikerta2023-June
ISSN (elektroninen)2642-5629

Conference

ConferenceInternational Symposium on Radiative Transfer
LyhennettäRAD
Maa/AlueKreikka
KaupunkiThessaloniki
Ajanjakso12/06/202316/06/2023

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