Numerical investigation on flow transition of two tandem circular cylinders in an X arrangement: Effects of spacing ratio and transverse inclination angle

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(1)

Published: Jan. 1, 2024

This paper reports on a numerical study of the effects five spacing ratios (L/D = 3–5) and eight transverse inclination angles (α 0°–30°) force coefficients wake patterns two tandem circular cylinders in an X arrangement, at subcritical Reynolds number Re 3900. It also addresses mutual interference between critical parameters determining flow transition (FT) from reattachment to co-shedding regime. The main findings are: (1) FT regimes was identified for considered range L/D α. induces sharp rise coefficients, especially downstream cylinder. can be triggered by ratio (L/D)c different α, as well excited angle αc L/D. (2) When α 0° (i.e., vertical cylinders), occurs 4.5–5. As increases 5°, 15°, 25°, gradually drops 4–4.5, 3.5–4, 3–3.5, respectively. From another perspective, with fixed 3.5, 4, 4.5, appears 20°–25°, 12.5°–15°, 0°–5°, Additionally, case 3 5, pattern, respectively, remains regimes. (3) formation regime requires sufficient gap space crossing cylinders. A nondimensional center top view (CS*top view), proposed reflect variation space. value CS*top excite falls within 3.5–5, which is function mathematical expression view) points predominant role when compared In addition, it accounts fact that has inverse effect vice versa. These provide new insight into understanding arrangement.

Language: Английский

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A review of flow-induced vibration in wind and oceanic flow: Mechanisms, applications, optimizations, and challenges

Ocean Engineering, Journal Year: 2025, Volume and Issue: 325, P. 120748 - 120748

Published: March 3, 2025

Language: Английский

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Dynamic load characteristics and wake vortex structure of spiral finned cylinders in cross-flow

Chinese Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Numerical study of flow characteristics around different arrays of cylinders at subcritical Reynolds number

Ocean Engineering, Journal Year: 2025, Volume and Issue: 327, P. 120923 - 120923

Published: March 22, 2025

Language: Английский

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Numerical study on flow-induced vibration of an oscillating cylinder with an unattached downstream square plate at a low Reynolds number

Ocean Engineering, Journal Year: 2023, Volume and Issue: 288, P. 116072 - 116072

Published: Oct. 25, 2023

Language: Английский

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