Slow drift damping force acting on a horizontal cylinder

Changhong Hu, Wataru Koterayama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The hydrodynamic forces acting on a circular cylinder and a rectangular cylinder undergoing slow drift oscillation in regular waves were investigated experimentally and numerically. Forced oscillation tests with low frequency and large amplitude in regular waves and forced two-harmonic oscillation with combined low and high frequencies were carried out in the experimental study. In the numerical study a finite-difference method was used to simulate viscous flow around a two-dimensional oscillating cylinder. The results of experiments showed that a horizontal rectangular cylinder oscillating slowly in waves has much higher damping coefficients than one oscillating in two-harmonic mode, while the numerical study indicated that such differences in the damping coefficient arise partly from the different effects of one-direction harmonic flow and rotating flow on the vortex shedding caused by the slow drift oscillation.

Original languageEnglish
Pages (from-to)105-113
Number of pages9
JournalJournal of Marine Science and Technology
Volume1
Issue number2
DOIs
Publication statusPublished - Jan 1 1996

Fingerprint

Oscillating cylinders
damping
Damping
oscillation
Vortex shedding
rotating flow
Viscous flow
Circular cylinders
vortex shedding
Finite difference method
hydrodynamic force
viscous flow
finite difference method
Hydrodynamics
experimental study
Experiments
experiment

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Slow drift damping force acting on a horizontal cylinder. / Hu, Changhong; Koterayama, Wataru.

In: Journal of Marine Science and Technology, Vol. 1, No. 2, 01.01.1996, p. 105-113.

Research output: Contribution to journalArticle

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