計算による3次元非定常流れの可視化

Material type: 文書・図像類

Author: 藤谷, 克郎ほか

Publisher: 航空宇宙技術研究所

Publication date: 1988-12

Material Format: Digital

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Note (General)：: Three-dimensional unsteady flow of the viscous incompressible fluid is calculated by using a finite-difference method and visualized by a graphic work...

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Material Type: 文書・図像類
Title: 計算による3次元非定常流れの可視化
Author/Editor: 藤谷, 克郎
姫野, 龍太郎
Fujitani, Katsuro
Himeno, Ryutaro
Author Heading: 藤谷, 克郎
姫野, 龍太郎
Fujitani, Katsuro
Himeno, Ryutaro
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1988-12
Publication Date (W3CDTF): 1988-12
Alternative Title: Visualization of the Computed Unsteady Flow in Three Dimensions
Periodical title: 航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory SP-9
No. or year of volume/issue: 9
Volume: 9
Pages: 61-66
ISSN (Periodical Title): ISSN : 0289-260X
Text Language Code: jpn
Target Audience: 一般
Note (General): Three-dimensional unsteady flow of the viscous incompressible fluid is calculated by using a finite-difference method and visualized by a graphic workstation. A grid system around an automobile has a multi-grid structure and is generated by a trans-finite-inter-polation method. The number of grid points is 112 by 73 by 56 and the Reynolds number based on the length of the automobile is 5,000,000. The calculation of a flow field is done on Fujitsu VP200 and its computational time is about 20 hours. Computed flow fields of 200 time steps are stored in magnetic tapes. Using them, streak-lines are calculated on a mini-supercomputer C-1 and even then visualized on a graphic workstation IRIS 4D. A motion film is taken the screen of IRIS 4D frame by flame using a computer-controlled VTR system. A longitudinal vortex on the side-window is almost steady. However, the other vortices, such as a horse-shoe vortex in front of the front windshield and vortices on the rear-window, show periodical changes and are shed one by one. It is found that a motion film makes the unsteady three-dimensional flow understandable and inevitable. Also, the amount of the data of the three-dimensional unsteady calculation is so huge that adequate shortening of data is necessary.
資料番号: NALSP0009010
レポート番号: NAL SP-9
Access Restrictions: 限定公開
Periodical Title (NCID): AN10097345
https://ci.nii.ac.jp/ncid/AN10097345
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): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ