書誌事項
- タイトル別名
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- Large-Scale Vortex Structure in the Wake of Circular Disk
抄録
<p>The vortex structures in the wake behind a circular disk, as a representative bluff body, were investigated by PIV measurement. Stereo PIV results perpendicular to the mainstream direction were visualized in the iso-surface of Q-criterion reconstructed three-dimensional vortex structure. It was found that the vortex structure at Re = 650 has a feature of staggered-type I with small vortices. In addition, velocity fluctuations in the wake behind a circular disk were decomposed into various scale structures by phase-averaged technique. The large-scale structures in the wake of circular disk were shown as alternatingly a series of connecting hairpin vortices. Small-scale structures revealed regular small vortices between adjacent hairpin vortices. Furthermore, we investigated the formation mechanism of the staggered-type I in the wake. When the vortices were separated, recirculation region was split into two vortex structures. One of those structure flowed downstream, rolled up as a vortex. The other went upstream, generating counter-rotating vortex with another recirculation region.</p>
収録刊行物
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- 日本機械学会関東支部総会講演会講演論文集
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日本機械学会関東支部総会講演会講演論文集 2023.29 (0), 17B05-, 2023
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390016427484654208
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- ISSN
- 24242691
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可