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Attenuating transmitted infragravity waves by a small heaving body.

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Title: Attenuating transmitted infragravity waves by a small heaving body.
Authors: Cui, Lidong1 (AUTHOR) lcui@swin.edu.au, Bennetts, Luke G.2 (AUTHOR), Westcott, Amy-Rose3 (AUTHOR), Leontini, Justin S.1,4 (AUTHOR), Sergiienko, Nataliia Y.1,4 (AUTHOR), Cazzolato, Benjamin S.2,4 (AUTHOR), Manasseh, Richard1,3 (AUTHOR)
Source: Journal of Fluid Mechanics. 10/10/2025, Vol. 1020, p1-35. 35p.
Subjects: Nonlinear waves, Floating bodies, Beach erosion, Energy conversion, Wave-current interaction, Offshore structures, Ocean energy resources, Shore protection
Abstract: When a water wave group encounters a floating body, it forces the body into motion; this motion radiates waves that modify the wave group. This study considers a floating body in the form of a two-dimensional (2-D) rectangular block constrained to heaving motion. The focus is on how the 2-D block modifies infragravity (IG) waves, a type of nonlinear low-frequency wave in the wave group. The IG waves transmitted beyond the block comprise two types: (i) bound IG waves generated by nonlinear interactions of first-order carrier waves, and (ii) free IG waves released due to discontinuities in flow potential created by the block. A systematic parameter sweep reveals that, when heaving motion is allowed, the transmitted IG waves differ significantly from those of stationary blocks. In some cases, heaving motion enables attenuation of the total transmitted IG waves, while stationary blocks cannot achieve similar effects. Only small-sized blocks are considered; they are 'small' compared with the IG wavelengths. The findings are relevant to dual-purpose wave energy converters designed for energy generation and coastal protection, floating breakwaters and other small-sized floating structures such as ships and some icebergs: the heaving motion of these objects may modify IG waves, thereby influencing harbour resonance, near-shore currents, beach erosion, wave forcing on ice shelves and coastal inundation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 189831729
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PubTypeId: academicJournal
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  Data: Attenuating transmitted infragravity waves by a small heaving body.
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  Data: <searchLink fieldCode="AR" term="%22Cui%2C+Lidong%22">Cui, Lidong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lcui@swin.edu.au</i><br /><searchLink fieldCode="AR" term="%22Bennetts%2C+Luke+G%2E%22">Bennetts, Luke G.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Westcott%2C+Amy-Rose%22">Westcott, Amy-Rose</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leontini%2C+Justin+S%2E%22">Leontini, Justin S.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sergiienko%2C+Nataliia+Y%2E%22">Sergiienko, Nataliia Y.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cazzolato%2C+Benjamin+S%2E%22">Cazzolato, Benjamin S.</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Manasseh%2C+Richard%22">Manasseh, Richard</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. 10/10/2025, Vol. 1020, p1-35. 35p.
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  Data: <searchLink fieldCode="DE" term="%22Nonlinear+waves%22">Nonlinear waves</searchLink><br /><searchLink fieldCode="DE" term="%22Floating+bodies%22">Floating bodies</searchLink><br /><searchLink fieldCode="DE" term="%22Beach+erosion%22">Beach erosion</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+conversion%22">Energy conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Wave-current+interaction%22">Wave-current interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Offshore+structures%22">Offshore structures</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean+energy+resources%22">Ocean energy resources</searchLink><br /><searchLink fieldCode="DE" term="%22Shore+protection%22">Shore protection</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: When a water wave group encounters a floating body, it forces the body into motion; this motion radiates waves that modify the wave group. This study considers a floating body in the form of a two-dimensional (2-D) rectangular block constrained to heaving motion. The focus is on how the 2-D block modifies infragravity (IG) waves, a type of nonlinear low-frequency wave in the wave group. The IG waves transmitted beyond the block comprise two types: (i) bound IG waves generated by nonlinear interactions of first-order carrier waves, and (ii) free IG waves released due to discontinuities in flow potential created by the block. A systematic parameter sweep reveals that, when heaving motion is allowed, the transmitted IG waves differ significantly from those of stationary blocks. In some cases, heaving motion enables attenuation of the total transmitted IG waves, while stationary blocks cannot achieve similar effects. Only small-sized blocks are considered; they are 'small' compared with the IG wavelengths. The findings are relevant to dual-purpose wave energy converters designed for energy generation and coastal protection, floating breakwaters and other small-sized floating structures such as ships and some icebergs: the heaving motion of these objects may modify IG waves, thereby influencing harbour resonance, near-shore currents, beach erosion, wave forcing on ice shelves and coastal inundation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1017/jfm.2025.10514
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      – Code: eng
        Text: English
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        PageCount: 35
        StartPage: 1
    Subjects:
      – SubjectFull: Nonlinear waves
        Type: general
      – SubjectFull: Floating bodies
        Type: general
      – SubjectFull: Beach erosion
        Type: general
      – SubjectFull: Energy conversion
        Type: general
      – SubjectFull: Wave-current interaction
        Type: general
      – SubjectFull: Offshore structures
        Type: general
      – SubjectFull: Ocean energy resources
        Type: general
      – SubjectFull: Shore protection
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      – TitleFull: Attenuating transmitted infragravity waves by a small heaving body.
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              M: 10
              Text: 10/10/2025
              Type: published
              Y: 2025
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