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Dual-plane stereoscopic PIV measurement of vortical structure in turbulent channel flow on sinusoidal riblet surface
https://uec.repo.nii.ac.jp/records/9361
https://uec.repo.nii.ac.jp/records/9361c402c3ec-de19-4846-9345-023288bbdcfe
名前 / ファイル | ライセンス | アクション |
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Mamori2016EJBF_ver12 (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-09-25 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Dual-plane stereoscopic PIV measurement of vortical structure in turbulent channel flow on sinusoidal riblet surface | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題 | turbulent flow | |||||
キーワード | ||||||
言語 | en | |||||
主題 | drag reduction | |||||
キーワード | ||||||
言語 | en | |||||
主題 | sinusoidal riblet | |||||
キーワード | ||||||
言語 | en | |||||
主題 | dual-plane PIV measurement | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Mamori, H.
× Mamori, H.× Yamaguchi, K.× Sasamori, M.× Iwamoto, K.× Murata, A. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Vortical structure in wall turbulence over a sinusoidal riblet surface is investigated by means of a dual-plane stereoscopic particle image velocimetry (DPS-PIV) measurement. The experiment is made in a channel flow at a friction Reynolds number of 150. The lateral spacing of the adjacent walls of the sinusoidal riblet varies in the streamwise direction and 12% of the drag reduction rate has been confirmed. The DPS-PIV measurement system consists of four high-speed CCD cameras. The laser sheets are provided on streamwise and wall-normal planes and separated 0.5 mm in the spanwise direction to each other. The profiles of the velocity statistics in the flat case show a good agreement with previous data. Since all velocity components can be measured on adjacent laser sheets simultaneously, an instantaneous velocity deformation tensor can be obtained and vortical structures can be identified by a second invariant of the tensor i.e., the Q value. The probability of Q value in the riblet side is almost unchanged from that of the flat side. The analysis of the tracking of vortical structures by using the Q value is performed. As similar to a pathline analysis in a previous study, we confirmed that the riblet surface prevents the vortical structure hitting the wall and vortical structures follow the upward and downward flows induced by the sinusoidal riblet surface. | |||||
書誌情報 |
en : European Journal of Mechanics - B/Fluids 巻 74, p. 99-110, 発行日 2019-04 |
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出版者 | ||||||
出版者 | Elsevier | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 09977546 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.euromechflu.2018.11.006 | |||||
権利 | ||||||
権利情報 | © 2019 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.euromechflu.2018.11.006 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa |