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非圧縮性高レイノルズ数流れの直接数値シミュレーション
https://jaxa.repo.nii.ac.jp/records/43151
https://jaxa.repo.nii.ac.jp/records/43151cb94d420-7c57-4da4-9158-06d42c7d79e5
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
nalsp0003009.pdf (809.7 kB)
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| Item type | テクニカルレポート / Technical Report(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | 非圧縮性高レイノルズ数流れの直接数値シミュレーション | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_18gh | |||||||||
| 資源タイプ | technical report | |||||||||
| その他のタイトル（英） | ||||||||||
| その他のタイトル | Direct Simulation of the Incompressible Flow at High Reynolds Number by Finite Difference Method | |||||||||
| 著者 |
河村, 哲也
× 河村, 哲也
× Kawamura, Tetuya
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| 著者所属 | ||||||||||
| 東京大学工学部 | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| Dept. of Applied Physics, University of Tokyo | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 航空宇宙技術研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | National Aerospace Laboratory(NAL) | |||||||||
| 書誌情報 |
航空宇宙技術研究所特別資料 en : Special Publication of National Aerospace Laboratory SP-3 巻 3, p. 67-76, 発行日 1984-11 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | A new upwind scheme for computation of incompressible flow has been developed. It was found that this scheme works well at high Reynolds numbers, even with a limited number of mesh points. By using this scheme, three different types of flows were computed. At first, a cavity flow was simulated at Re | |||||||||
| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | A new upwind scheme for computation of incompressible flow has been developed. It was found that this scheme works well at high Reynolds numbers, even with a limited number of mesh points. By using this scheme, three different types of flows were computed. At first, a cavity flow was simulated at Re = 5000, with a 4 1 by 41 grid, and the results agree very well with the computation with a 257 by 257 grid by Ghia et al. Secondly, a flow past a circular cylinder was simulated. Results of the detailed calculations of the impulsively started flow at Re = 1200 are compared with corresponding experimental observations and the comparison is found satisfactory. A series of calculations of the flow around a circular cylinder with surface roughness was carried out over a Reynolds number range from 103 to l05. Remarkable reduction of drag co-efficient was observed, showing that a critical Reynolds number is obtained numerically in this calculation. Moreover, the present results were found to be consistent with the experimental fact that an asymmetrical flow state (such that the separation bubbles exist on only one side of a cylinder) is stably maintained in the critical range. Thirdly, a three-dimensional turbulent flow in a duct was simulated and large structures in the turbulent flow were captured by this scheme without any turbulence model. Agreement of statistical values with experiments was good. Moreover, the transition to turbulence was well simulated. These results show that this scheme is very widely applicable and is robust and easy to program for any type of incompressible flow computations. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0289-260X | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AN10097345 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: NALSP0003009 | |||||||||
| レポート番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | レポート番号: NAL SP-3 | |||||||||
