Wake flow structure and hydrodynamic characteristics of flow around a C-shaped cylinder with variable attack angle at low Reynolds numbers Article Swipe
Yue Gao
,
Hongjun Zhu
,
Xinyu Zhou
,
Md. Mahbub Alam
,
Tongming Zhou
,
Tao Tang
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1063/5.0180753
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1063/5.0180753
A numerical investigation is conducted on the flow over a C-shaped cylinder in the low Reynolds number range of Re = 40–160. The effect of attack angle (α) ranging from 0° to 180° is examined simultaneously. Wake evolution and vortex structure as well as the hydrodynamic characteristics are analyzed. Seven flow patterns are identified based on the location of boundary layer separation points and the evolution of near-wall vortices. The boundary layer separation points lock on the two ends of the C-shaped cylinder, resulting in the typical Karman vortex street (Pattern I). A separation point shifts to the curved surface in Pattern II-1 and Pattern II-2, and a quasi-stagnation vortex (QS) is formed within the groove in Pattern II-2. In Pattern III-1 and Pattern III-2, the QS fills the groove. The subordinate vortex is observed in the groove close to the lower end (Pattern IV). The complicated vortex merging occurs around the lower end in Pattern V. The separation points lock on the two ends, exhibiting a pair of counter-rotating vortex shedding downstream of the two ends (Pattern VI). No vortex shedding is found in Pattern VII. Additionally, the characteristic parameters and the hydrodynamic coefficients are related, and they are associated with the flow pattern partition. Four types of vortex street are identified in the wake of the C-shaped cylinder, including no vortex street, 2S vortex mode and decayed vortex street, 2S vortex mode and secondary vortex street (2S-SVS), and P + S vortex mode and secondary vortex street in vortex evolution (P + S-SVS).
Related Topics
Concepts
Vortex
Wake
Vortex shedding
Reynolds number
Horseshoe vortex
Physics
Mechanics
Starting vortex
Kármán vortex street
Boundary layer
Cylinder
Geometry
Flow separation
Vortex ring
Stagnation point
Classical mechanics
Turbulence
Mathematics
Heat transfer
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1063/5.0180753
- OA Status
- green
- Cited By
- 11
- References
- 35
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4390730523
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4390730523Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1063/5.0180753Digital Object Identifier
- Title
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Wake flow structure and hydrodynamic characteristics of flow around a C-shaped cylinder with variable attack angle at low Reynolds numbersWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-01-01Full publication date if available
- Authors
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Yue Gao, Hongjun Zhu, Xinyu Zhou, Md. Mahbub Alam, Tongming Zhou, Tao TangList of authors in order
- Landing page
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https://doi.org/10.1063/5.0180753Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
- OA URL
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https://research-repository.uwa.edu.au/en/publications/795cfc41-c77c-494d-b064-6322a75a734fDirect OA link when available
- Concepts
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Vortex, Wake, Vortex shedding, Reynolds number, Horseshoe vortex, Physics, Mechanics, Starting vortex, Kármán vortex street, Boundary layer, Cylinder, Geometry, Flow separation, Vortex ring, Stagnation point, Classical mechanics, Turbulence, Mathematics, Heat transferTop concepts (fields/topics) attached by OpenAlex
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11Total citation count in OpenAlex
- Citations by year (recent)
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2025: 3, 2024: 8Per-year citation counts (last 5 years)
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35Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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