Numerical analysis of natural convection behavior in density stratification induced by external cooling of a containment vessel

Material type: 文書・図像類

Author: Ishigaki, Masahiroほか

Publisher: Elsevier

Publication date: 2022-04

Material Format: Digital

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Note (General)：: It is essential to improve computational fluid dynamics (CFD) analysis accuracy to estimate thermal flow in a containment vessel during a severe accid...

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Material Type: 文書・図像類
Title: Numerical analysis of natural convection behavior in density stratification induced by external cooling of a containment vessel
Author/Editor: Ishigaki, Masahiro
Abe, Satoshi
Hamdani, Ari
Hirose, Yoshiyasu
Author Heading: Ishigaki, Masahiro
Abe, Satoshi
Hamdani, Ari
Hirose, Yoshiyasu
Publication, Distribution, etc.: Elsevier
Publication Date: 2022-04
Publication Date (W3CDTF): 2022-04
Alternative Title: Numerical analysis of natural convection behavior in density stratification induced by external cooling of a containment vessel
Periodical title: Annals of Nuclear Energy
No. or year of volume/issue: 168 108867
Volume: 168
Issue: 108867
Pages: 1-46
ISSN (Periodical Title): ISSN : 0306-4549
Text Language Code: eng
Subject Heading: Containment vessel
Hydrogen transport
CIGMA
Natural convection
RANS
Target Audience: 一般
Note (General): It is essential to improve computational fluid dynamics (CFD) analysis accuracy to estimate thermal flow in a containment vessel during a severe accident. Previous studies pointed out the importance of the initial and boundary conditions on the analysis. The purpose of this study is to evaluate the influence of initial and boundary conditions by numerical analysis of natural convection experiments. A density stratification layer was initially formed, and natural convection was induced by the external cooling of the vessel. Mixing by natural convection eroded the density stratification. We applied the RANS model with dynamic turbulent Schmidt number model. We used the measured temperature and gas concentration as the boundary and initial conditions. The erosion velocity did not change much with the initial gas distribution. The temperature boundary condition of small internal structures significantly influenced the fluid temperature distribution, and we evaluated this influence of the small internal structure quantitatively.
source:https://www.sciencedirect.com/science/article/pii/S0306454921007441?via%3Dihub
Source: https://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=29360&item_no=1&attribute_id=22&file_no=1
https://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=29360&item_no=1&attribute_id=22&file_no=1
Access Restrictions: 限定公開
Related Material (DOI): 10.1016/j.anucene.2021.108867
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ