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Updated: Apr 19, 2026
08:54
Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
Published on: February 13, 2018
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The interaction between steep waves and a surface-piercing column
1Department of Civil and Environmental Engineering, Imperial College London, London SW7 2BU, UK c.swan@imperial.ac.uk.
Summary
This study reveals two high-frequency wave scattering types around surface-piercing columns. Interactions can amplify scattering, causing localized effects like vertical jetting, impacting offshore structure design.
Area of Science:
- Fluid Dynamics
- Ocean Engineering
- Wave Mechanics
Background:
- Surface-piercing columns are crucial in offshore structures.
- Understanding wave interactions is vital for structural integrity and safety.
- Existing diffraction models struggle with complex scattering phenomena.
Purpose of the Study:
- To experimentally investigate high-frequency wave scattering by a single surface-piercing column.
- To identify and characterize different modes of wave scattering.
- To analyze the implications of wave scattering on offshore structure design.
Main Methods:
- Experimental observations of wave scattering around a column.
- Focus on the drag-inertia flow regime.
- Analysis of wave cycle phasing and fluid circulation effects.
Main Results:
- Identified two distinct high-frequency wave scattering types.
- The second scattering mode is influenced by fluid circulation time-scale, not captured by harmonic analysis.
- Wave interactions can significantly amplify scattered waves, especially the second type.
- Observed localized free-surface effects, including vertical jetting.
Conclusions:
- Existing diffraction theories are insufficient for describing observed scattering phenomena.
- Amplified scattering and jetting have critical implications for deck elevation, wave slamming, and run-up velocities.
- Further research is needed to refine models for accurate prediction of wave-structure interactions.
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