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表面張力による液糸分断機構の解明に関する数値解析
https://jaxa.repo.nii.ac.jp/records/5632
https://jaxa.repo.nii.ac.jp/records/56322d8dde8a-8127-472f-92b1-2733e6fac348
名前 / ファイル | ライセンス | アクション |
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63742026.pdf (1.0 MB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 表面張力による液糸分断機構の解明に関する数値解析 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 液糸 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 毛細管 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | キャピラリー波 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 界面張力 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ウェーバー数 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 微粒化 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 流れの安定性 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 微小重力 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 計算流体力学 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ligament | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | capillary tube | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | capillary wave | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | interfacial tension | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Weber number | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | atomization | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | flow stability | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | microgravity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | computational fluid dynamics | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Numerical study on ligament breakup mechanism due to capillary force | |||||
著者 |
新城, 淳史
× 新城, 淳史× 松山, 新吾× 溝渕, 泰寛× 小川, 哲× 梅村, 章× Shinjo, Junji× Matsuyama, Shingo× Mizobuchi, Yasuhiro× Ogawa, Satoru× Umemura, Akira |
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著者所属 | ||||||
宇宙航空研究開発機構 総合技術研究本部 | ||||||
著者所属 | ||||||
宇宙航空研究開発機構 総合技術研究本部 | ||||||
著者所属 | ||||||
宇宙航空研究開発機構 総合技術研究本部 | ||||||
著者所属 | ||||||
宇宙航空研究開発機構 総合技術研究本部 | ||||||
著者所属 | ||||||
名古屋大学 大学院工学研究科 | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency Institute of Aerospace Technology | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency Institute of Aerospace Technology | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency Institute of Aerospace Technology | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Aerospace Exploration Agency Institute of Aerospace Technology | ||||||
著者所属(英) | ||||||
en | ||||||
Nagoya University Graduate School of Engineering | ||||||
出版者 | ||||||
出版者 | 宇宙航空研究開発機構 | |||||
出版者(英) | ||||||
出版者 | Japan Aerospace Exploration Agency (JAXA) | |||||
書誌情報 |
宇宙航空研究開発機構特別資料: 第39回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2007論文集 en : JAXA Special Publication: Proceedings of 39th Fluid Dynamics Conference/Aerospace Numerical Simulation Symposium 2007 巻 JAXA-SP-07-016, p. 160-165, 発行日 2008-02-29 |
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抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | This paper presents a numerical study on ligament breakup mechanism due to capillary force. In contrast to the classical Rayleigh analysis, the effect of ligament tip is included to examine the role of capillary waves from the tip. The numerical setup corresponds to a series of microgravity experiments conducted at Nagoya University. Based on Weber's similarity law (We is approximately O(1)), a low-speed jet of liquid SF6 is injected into high-pressure (9.1 MPa) ambient nitrogen and short-wave breakup that is different from Rayleigh's analysis is observed in the experiment. The present numerical simulation has reproduced the same pinch-off and shown that droplet pinch-off from the tip is a combination of multiple phenomena. One is the short-wave breakup. Capillary waves from the tip propagate upstream, become unstable and lead to droplet formation at the tip. This is a closed and self-sustained cycle. This destabilization process is driven by the dynamics of the tip bulb and capillary waves. The elongation by the gas flow also strengthens the pinch-off. As the liquid column length becomes longer, the other mode of long-wave instability also appears. This mode corresponds to the convective Rayleigh mode. Short capillary waves from the tip reach the nozzle exit and are reflected. They become the source of this convective instability. The present study has shown that the ligament tip plays an important role in droplet breakup. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1349-113X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11984031 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0063742026 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: JAXA-SP-07-016 |