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Experimental investigation of relaminarizing and transitional channel flows
http://hdl.handle.net/10091/17151
http://hdl.handle.net/10091/17151e79fb7d4-ba7b-403f-a19f-4dd4d8b0eb5b
| 名前 / ファイル | ライセンス | アクション |
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Experimental_investigation_relaminarizing_transitional_channel_flows.pdf (3.5 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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| 公開日 | 2013-09-18 | |||||||||
| タイトル | ||||||||||
| タイトル | Experimental investigation of relaminarizing and transitional channel flows | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| DOI | ||||||||||
| 関連識別子 | https://doi.org/10.1063/1.4772065 | |||||||||
| 関連名称 | 10.1063/1.4772065 | |||||||||
| 資源タイプ | ||||||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| タイプ | journal article | |||||||||
| 著者 |
Seki, Daisuke
× Seki, Daisuke
× Matsubara, Masaharu
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| 信州大学研究者総覧へのリンク | ||||||||||
| 氏名 | Matsubara, Masaharu | |||||||||
| URL | http://soar-rd.shinshu-u.ac.jp/profile/ja.OCkabpkh.html | |||||||||
| 出版者 | ||||||||||
| 出版者 | AMER INST PHYSICS | |||||||||
| 引用 | ||||||||||
| 内容記述 | PHYSICS OF FLUIDS. 24(12):124102 (2012) | |||||||||
| 書誌情報 |
PHYSICS OF FLUIDS 巻 24, 号 12, p. 124102, 発行日 2012-12 |
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| 抄録 | ||||||||||
| 内容記述 | A hot-wire measurement was conducted in a planar channel flow that originated from a strongly disturbed flow in an entrance channel followed by an expansion channel used to reduce the Reynolds number (Re). From ceasing decrease of the streamwise velocity fluctuation energy and the linear extrapolation of the intermittency factor, the lower marginal Re, which is defined as the minimum Re for partial existence of sustainable turbulence, is estimated around 1400 based on the channel width and the bulk velocity. The upper marginal Re at which the intermittency factor reaches one is about 2600. The flow fields passing a turbulent patch were reconstructed with conditional sampling of the streamwise velocity data based on the time of laminar-turbulence interfaces and the reconstructed flow fields indicate a large-scale flow structure across laminar and turbulent parts. This large structure makes it possible for some regions to be at higher Re than the average, so that turbulence can partly survive. The moderate-scale disturbances larger than the turbulent one appear in the non-turbulent parts of the transitional flow, and in these cases the non-turbulent velocity profile is almost identical to the turbulent one. The large-scale fluctuation is observed even over Re = 2600. This leads to the conclusion that a turbulent channel flow close to the upper marginal Re becomes inhomogeneous. (C) 2012 American Institute of Physics. [https://doi.org/10.1063/1.4772065] | |||||||||
| 資源タイプ（コンテンツの種類） | ||||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 1070-6631 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA10986202 | |||||||||
| 権利 | ||||||||||
| 権利情報 | Copyright© 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Phys. Fluids 24, 124102 (2012); and may be found at https://doi.org/10.1063/1.4772065 . | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| WoS | ||||||||||
| URL | http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000312833500024 | |||||||||
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Cite as
Seki, Daisuke, Matsubara, Masaharu, 2012, Experimental investigation of relaminarizing and transitional channel flows: AMER INST PHYSICS, 124102– p.
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