TY - GEN
T1 - Fluid Dynamics Around a Whisker
AU - Alam, Md Mahbub
AU - Shi, Xiaoyu
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
PY - 2026
Y1 - 2026
N2 - A harbor seal whisker is generally elliptic, having a wavy surface along the whisker axis. Compared to a straight cylinder, a wavy elliptic cylinder can modify the vortex shedding, making the flow incoherent, and elongate the vortex formation length, reducing the fluid force. This numerical study explores how the spanwise wavelength (λ) of a sinusoidal wavy cylinder with an elliptic cross-section affects wake structures and fluid forces at a Reynolds number of 100. The investigation covers a wide range of wavelengths (0.43 ≤ λ/Dm ≤ 8.59), with a wave amplitude of a/Dm = 0.048, where Dm represents the hydraulic diameter of the wavy cylinder. The results reveal five distinct flow patterns (I − V), depending on λ/Dm. Notably, flow pattern IV exhibits a unique behavior compared to traditional flows: instead of synchronous vortex shedding along the entire cylinder, vortex shedding occurs alternately over one half of the wavelength, out of phase with the other half, resulting in zero net fluctuating lift over one complete wavelength.
AB - A harbor seal whisker is generally elliptic, having a wavy surface along the whisker axis. Compared to a straight cylinder, a wavy elliptic cylinder can modify the vortex shedding, making the flow incoherent, and elongate the vortex formation length, reducing the fluid force. This numerical study explores how the spanwise wavelength (λ) of a sinusoidal wavy cylinder with an elliptic cross-section affects wake structures and fluid forces at a Reynolds number of 100. The investigation covers a wide range of wavelengths (0.43 ≤ λ/Dm ≤ 8.59), with a wave amplitude of a/Dm = 0.048, where Dm represents the hydraulic diameter of the wavy cylinder. The results reveal five distinct flow patterns (I − V), depending on λ/Dm. Notably, flow pattern IV exhibits a unique behavior compared to traditional flows: instead of synchronous vortex shedding along the entire cylinder, vortex shedding occurs alternately over one half of the wavelength, out of phase with the other half, resulting in zero net fluctuating lift over one complete wavelength.
KW - Whiskers
KW - bifurcation flow
KW - wavy elliptic cylinder
UR - https://www.scopus.com/pages/publications/105020891348
U2 - 10.1007/978-981-95-2098-5_49
DO - 10.1007/978-981-95-2098-5_49
M3 - 会议稿件
AN - SCOPUS:105020891348
SN - 9789819520978
T3 - Lecture Notes in Computer Science
SP - 581
EP - 588
BT - Intelligent Robotics and Applications - 18th International Conference, ICIRA 2025, Proceedings
A2 - Matsuno, Takayuki
A2 - Liu, Honghai
A2 - Liu, Lianqing
A2 - Yin, Zhouping
A2 - Zhu, Xiangyang
A2 - Ren, Weihong
A2 - Wang, Zhiyong
A2 - Sheng, Yixuan
PB - Springer Science and Business Media Deutschland GmbH
T2 - 18th International Conference on Intelligent Robotics and Applications, ICIRA 2025
Y2 - 6 August 2025 through 9 August 2025
ER -