On the stable posture of a pair of parallel cylinders in a uniform flow

The stable posture of a pair of parallel circular cylinders in a uniform flow was experimentally studied when it was free to rotate about an axis at the middle of the two cylinders. The cylinder pair comes to rest facing the oncoming flow side by side, the line connecting the centers of the two cyli...

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Bibliographic Details
Published in:Fluid dynamics research 1991-11, Vol.8 (5), p.253-272
Main Authors: Tatsuno, Masakazu, Amamoto, Hajime, Ishi-i, Koji, Takayama, Tetsunobu
Format: Article
Language:English
Subjects:
cylinders
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamic stability
Physics
stability
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Summary:The stable posture of a pair of parallel circular cylinders in a uniform flow was experimentally studied when it was free to rotate about an axis at the middle of the two cylinders. The cylinder pair comes to rest facing the oncoming flow side by side, the line connecting the centers of the two cylinders being perpendicular to the flow, when s d = 0.5, where s is the distance between the center of rotation and the central axis of each cylinder and d is the diameter of the cylinder. When s d = 1.0 or 1.5, the cylinder pair is stable both in tandem, with one cylinder behind the other, and in side-by-side arrangements to the oncoming flow. When s d ⩾ 2.0, the cylinder pair is stable only in tandem arrangements.
ISSN:0169-5983
1873-7005
1873-7005
DOI:10.1016/0169-5983(91)90046-L