Unsteady Three-Dimensional Behavior of Natural Convection in Horizontal Annulus, (IV) Application of LES to Turbulent Natural Convection

Noboru Taniguchi; Yukinori Usui; Masahiro Furuya; Yasutomi Miki; Kenji Fukuda; Syu Hasegawa

doi:10.3327/jaesj.34.996

Unsteady Three-Dimensional Behavior of Natural Convection in Horizontal Annulus, (IV) Application of LES to Turbulent Natural Convection

Noboru Taniguchi, Yukinori Usui, Masahiro Furuya, Yasutomi Miki, Kenji Fukuda, Syu Hasegawa

研究成果: Article › 査読

抄録

The large eddy simulation (LES) method is applied to turbulent natural convection in a horizontal concentric annulus. Numerical results are obtained for Rayleigh numbers based on the gap width from 2.51 ×10⁶ to 1.18 ×10⁹. These results are compared with other researchers' experimental data and the validity of LES is investigated. It is found that LES is very useful even if at high Ra, at which the DNS is not applicable. However, in the cases where temperature differences between cylinders are large, effect of dependency of physical properties on temperature is not negligible, which causes the poor coincidence betwenn the experiments and the numerical results.

本文言語	English
ページ（範囲）	996-1004
ページ数	9
ジャーナル	Nippon Genshiryoku Gakkaishi/Journal of the Atomic Energy Society of Japan
巻	34
号	10
DOI	https://doi.org/10.3327/jaesj.34.996
出版ステータス	Published - 1992
外部発表	はい

ASJC Scopus subject areas

原子力エネルギーおよび原子力工学

文献へのアクセス

10.3327/jaesj.34.996

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引用スタイル

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abstract = "The large eddy simulation (LES) method is applied to turbulent natural convection in a horizontal concentric annulus. Numerical results are obtained for Rayleigh numbers based on the gap width from 2.51 ×106 to 1.18 ×109. These results are compared with other researchers' experimental data and the validity of LES is investigated. It is found that LES is very useful even if at high Ra, at which the DNS is not applicable. However, in the cases where temperature differences between cylinders are large, effect of dependency of physical properties on temperature is not negligible, which causes the poor coincidence betwenn the experiments and the numerical results.",

keywords = "Rayleigh number, Smagorinsky constant, accuracy, comparative evaluations, concentric horizontal annulus, energy spectra, experimental data, finite difference method, large eddy simulation, large eddy simulation, temperature dependence, turbulent natural convection",

author = "Noboru Taniguchi and Yukinori Usui and Masahiro Furuya and Yasutomi Miki and Kenji Fukuda and Syu Hasegawa",

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AU - Taniguchi, Noboru

AU - Usui, Yukinori

AU - Furuya, Masahiro

AU - Miki, Yasutomi

AU - Fukuda, Kenji

AU - Hasegawa, Syu

PY - 1992

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