Variation in Vortex-Induced Vibration Phenomenon Due to Surface Roughness on Low- and High-Mass-Ratio Circular Cylinders: A Numerical Study

被引:6
作者
Anwar, Muhammad Usman [1 ]
Khan, Niaz Bahadur [1 ]
Arshad, Muhammad [2 ]
Munir, Adnan [1 ]
Bashir, Muhammad Nasir [1 ]
Jameel, Mohammed [3 ]
Rehman, Muhammad Faisal [4 ]
Eldin, Sayed M. [5 ]
机构
[1] Natl Univ Sci & Technol NUST, Sch Mech & Mfg Engn, Islamabad 44000, Pakistan
[2] King Khalid Univ, Coll Engn, Dept Chem Engn, Abha 61421, Saudi Arabia
[3] King Khalid Univ, Coll Engn, Dept Civil Engn, POB 960, Abha 61421, Saudi Arabia
[4] Univ Engn & Technol Peshawar, Dept Architecture, Abbottabad Campus, Peshawar 25000, Pakistan
[5] Future Univ Egypt, Fac Engn, Ctr Res, New Cairo 11835, Egypt
关键词
CFD; vortex-induced vibration; mass ratio; circular cylinder; surface roughness; flow; SIMULATION;
D O I
10.3390/jmse10101465
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Fluid-structure interaction has been widely studied in the last few decades due to its wide range of applications in engineering fields. This phenomenon plays an important design role, for example, in offshore risers, high slender buildings, chimney stacks and heat exchangers. The vortex shedding generated from a bluff body can induce high-amplitude oscillations, known as vortex-induced vibrations (VIVs). This study presents a numerical analysis to investigate the impact of surface roughness on VIV in the crossflow direction of a circular cylinder. The study also investigates the impact of surface roughness with variation in mass ratio from 2.4 to 11 at a high Reynolds number (Re) = 10(4) using Reynolds-averaged Navier-Stokes (RANS) equations. The study concludes that roughness on a cylinder results in a reduction in amplitude response. Furthermore, the lock-in region is narrower compared to that of a smooth cylinder, irrespective of the mass ratio. However, it is observed that the impact of surface roughness is more significant in high-mass-ratio cylinders where the lock-in region is more squeezed and shifted toward lower reduced velocities. Furthermore, the vortex mode beyond reduced velocities Ur = 5.84 and 7.52 was observed to be 2S for high and low mass ratios, respectively.
引用
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页数:10
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