Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Numerical simulation of flow past forced and freely vibrating cylinder at low Reynolds number

Authors
정재환남보우정동호
Issue Date
12월-2017
Publisher
한국해양공학회지
Keywords
Vortex-Induced Vibration; Forced & freely vibrating cylinder; Drag; Lift
Citation
Journal of Advanced Research in Ocean Engineering, v.3, no.4, pp 165 - 173
Pages
9
Journal Title
Journal of Advanced Research in Ocean Engineering
Volume
3
Number
4
Start Page
165
End Page
173
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9703
DOI
10.5574/JAROE.2017.3.4.165
Abstract
This study aims at validating simulations of the forced and freely vibrating cylinders at Reynolds number of ap-proximately 500 in order to identify the capability of the CFD code, and to establish the analysis process of the vor-tex-induced vibration (VIV). The direct numerical and large eddy simulations were employed to resolve the various length scales of the vortices, and the morphing technique was used to consider a motion of the circular cylinder. For the forced vibration case, both in- and anti-phase VIV processes were observed regarding the frequency ratio. Namely, when the frequency ratio approaches to unity, the synchronization/lock-in process occurs, leading to sub-stantial increases in drag and lift coefficients. This is strongly linked with the switch in timing of the vortex for-mation, and this physical tendency is consistent with that of Blackburn and Henderson (J. Fluid Mech., 1999, 385, 255-286) as well as force coefficients. For the free oscillation case, the mass and damping ratio of 50.8 and 0.0024 were considered based on the study of Blackburn et al. (J. Fluid Struct., 2000, 15, 481-488) to allow the direct com-parison of simulation results. The simulation results for a peak amplitude of the cylinder and a shedding mode are reasonably comparable to that of Blackburn et al. (2000). Consequently, based on aforementioned results, it can be concluded that numerical methods were successfully validate
Files in This Item
Appears in
Collections
친환경해양개발연구본부 > 심해공학연구센터 > Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Jung, Jae Hwan photo

Jung, Jae Hwan
친환경해양개발연구본부 (심해공학연구센터)
Read more

Altmetrics

Total Views & Downloads

BROWSE