TY - GEN
T1 - Passive Vibration Reduction in Circular Cylinders
T2 - 9th World Congress on Momentum, Heat and Mass Transfer, MHMT 2024
AU - Ali, Ussama
AU - Islam, MD Didarul
AU - Janajreh, Isam
N1 - Publisher Copyright:
© 2024, Avestia Publishing. All rights reserved.
PY - 2024
Y1 - 2024
N2 - This work investigates a passive flow control method to mitigate vortex-induced vibration (VIV) by introducing a slit into a circular structure. The impact of varying slit sizes on the behaviour of a cylinder subjected to VIV is investigated across different reduced velocities (Ur) at a Reynolds number (Re) of 100. The size of the slit (S/D) is adjusted from 0 (without slit) to 0.1 & 0.2, where S corresponds to the width of slit & D the cylinder diameter. The mass and damping ratios are fixed at m* = 10 and ζ = 0.005, respectively, while Ur is varied from 2 to 10. The numerical analysis is conducted using Ansys/Fluent, incorporating mesh motion to consider cylinder vibration. The outcomes are presented in terms of vibration amplitude & frequency, drag & lift coefficients, Strouhal number, and vorticity contours. The findings suggest that the slit reduces lift and drag coefficients, effectively suppressing VIV. Examining maximum vibration amplitude, a 10% slit results in a 5.16% decrease, whereas a 20% slit leads to a substantial 34.27% reduction compared to a solid cylinder.
AB - This work investigates a passive flow control method to mitigate vortex-induced vibration (VIV) by introducing a slit into a circular structure. The impact of varying slit sizes on the behaviour of a cylinder subjected to VIV is investigated across different reduced velocities (Ur) at a Reynolds number (Re) of 100. The size of the slit (S/D) is adjusted from 0 (without slit) to 0.1 & 0.2, where S corresponds to the width of slit & D the cylinder diameter. The mass and damping ratios are fixed at m* = 10 and ζ = 0.005, respectively, while Ur is varied from 2 to 10. The numerical analysis is conducted using Ansys/Fluent, incorporating mesh motion to consider cylinder vibration. The outcomes are presented in terms of vibration amplitude & frequency, drag & lift coefficients, Strouhal number, and vorticity contours. The findings suggest that the slit reduces lift and drag coefficients, effectively suppressing VIV. Examining maximum vibration amplitude, a 10% slit results in a 5.16% decrease, whereas a 20% slit leads to a substantial 34.27% reduction compared to a solid cylinder.
KW - Computational fluid dynamics (CFD)
KW - Elastically mounted cylinder
KW - Lift & Drag
KW - Passive flow control
KW - Slit effect
KW - Vortex-induced vibrations
UR - https://www.scopus.com/pages/publications/105003825645
U2 - 10.11159/enfht24.298
DO - 10.11159/enfht24.298
M3 - Conference contribution
AN - SCOPUS:105003825645
SN - 9781990800344
T3 - Proceedings of the World Congress on Momentum, Heat and Mass Transfer
BT - Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer, MHMT 2024
A2 - Cheng, Lixin
A2 - Karayiannis, Tassos G.
A2 - Murshed, Sohel
Y2 - 11 April 2024 through 13 April 2024
ER -