Fluid Flow around a Circular Cylinder with Triangular Grooves
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- YAMAGISHI Yoichi
- Department of Mechanical Engineering, Kanagawa Institute of Technology
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- AKAIKE Shiro
- Department of Mechanical Engineering, Kanagawa Institute of Technology
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- OKI Makoto
- 東海大学開発工学部
Bibliographic Information
- Other Title
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- 三角形溝つき円柱周りの流れ
Abstract
In the flow around a circular cylinder, the sudden decrease in the drag force occurs at a high Reynolds number, but the same phenomenon occurs at a lower Reynolds number in the case where there exist grooves or roughness on the circular cylinder surface. In this paper, in order to make clear the flow characteristics around a circular cylinder with triangular grooves, drag coefficient, pressure distribution and Strouhal number were measured. Moreover the flow was analyzed by applying the RNG k-ε turbulent model and the surface flow pattern was investigated using oil-film technique. Consequently, it is made clear that the reattachment point changes position in each groove and the drag coefficient of a circular cylinder with triangular grooves decreases compared with a circular cylinder with arc grooves.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 70 (694), 1467-1472, 2004
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001206262416256
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- NII Article ID
- 130004225092
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- ISSN
- 18848346
- 03875016
- http://id.crossref.org/issn/03875016
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed