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The hydrodynamic forces acting on a long flexible circular cylinder responding to VIV

The hydrodynamic forces acting on a long flexible circular cylinder responding to VIV
The hydrodynamic forces acting on a long flexible circular cylinder responding to VIV
Distributions of the fluid forces acting along a long flexible circular cylinder free to respond in-line and transverse to a stepped current are presented. Forces are calculated using a finite element model of the cylinder with measured responses providing the input. The length to diameter ratio of the model used was 469, the mass ratio was 3 and the Reynolds number could be varied up to maximum value of approximately 2:6 ¢104. Fluid force coefficients for two cases are presented: in the first, the dominant modes are the 2nd cross-flow and the 4th in line. For the second case the leading modes are the 7th and 12th respectively. In general, transverse force coefficients and in-line drag coefficients are found to be larger than those measured for short sections of cylinder undergoing free and forced one and two-dimensional motions. It is anticipated that the results will be of value to developers of vortex-induced vibration prediction methods.
PVP2006-ICPVT11
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f

Chaplin, J.R. (2006) The hydrodynamic forces acting on a long flexible circular cylinder responding to VIV. Proceedings of the 6th International Conference on FSI, AE & FIV+N, ASME PVP Division summer meeting. 23 - 27 Jul 2006. PVP2006-ICPVT11 .

Record type: Conference or Workshop Item (Paper)

Abstract

Distributions of the fluid forces acting along a long flexible circular cylinder free to respond in-line and transverse to a stepped current are presented. Forces are calculated using a finite element model of the cylinder with measured responses providing the input. The length to diameter ratio of the model used was 469, the mass ratio was 3 and the Reynolds number could be varied up to maximum value of approximately 2:6 ¢104. Fluid force coefficients for two cases are presented: in the first, the dominant modes are the 2nd cross-flow and the 4th in line. For the second case the leading modes are the 7th and 12th respectively. In general, transverse force coefficients and in-line drag coefficients are found to be larger than those measured for short sections of cylinder undergoing free and forced one and two-dimensional motions. It is anticipated that the results will be of value to developers of vortex-induced vibration prediction methods.

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More information

Published date: July 2006
Venue - Dates: Proceedings of the 6th International Conference on FSI, AE & FIV+N, ASME PVP Division summer meeting, 2006-07-23 - 2006-07-27

Identifiers

Local EPrints ID: 53475
URI: https://eprints.soton.ac.uk/id/eprint/53475
PURE UUID: 00c140fb-89f3-4ce2-94bb-0558cd10f190

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Date deposited: 29 Jul 2008
Last modified: 13 Mar 2019 20:40

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