Wide-field-of-view PIV measurements above and below microscale breaking waves.
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| Title: | Wide-field-of-view PIV measurements above and below microscale breaking waves. |
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| Authors: | Tondu, Camille1 (AUTHOR) camille.tondu@hereon.de, Gade, Martin2 (AUTHOR) martin.gade@uni-hamburg.de, Morales Meabe, Julián2 (AUTHOR) julian.morales.meabe@studium.uni-hamburg.de, Buckley, Marc P.1 (AUTHOR) marc.buckley@hereon.de |
| Source: | Experiments in Fluids. Nov2025, Vol. 66 Issue 11, p1-14. 14p. |
| Subjects: | Particle image velocimetry, Capillary waves, Laser-induced fluorescence, Wind waves, Boundary layer separation, Water waves, Turbulence, Ocean waves |
| Abstract: | Small-scale physical processes within the first centimeters above and below ocean surface waves are important for atmosphere-ocean momentum and energy budgets. The complex feedback mechanisms between airflow separation, turbulence under microscale breaking wave crests, and associated parasitic capillary waves remain to be fully understood. A new, 51-cm-wide-field-of-view laser imaging system was developed, which involves high-resolution (one velocity vector every 133 µm) air–water PIV (particle image velocimetry, 33 µm/pixel) and LIF (laser-induced fluorescence, 52 µm/pixel). The system was installed at a fetch of 15.5 m in the 24-m-long, 1-m-wide, 1.5-m-high wind-wave tank of the University of Hamburg (Germany). Wind-generated waves were examined at a reference wind speed of 4.5 m/s. The wide-field-of-view air-side PIV measurements display intense airflow separation events past waves, with sheltering effects that affect several waves downwind. Chronological sequences of air and water-side PIV measurements (11 wide-field-of-view PIV frames per second) allow us to follow the evolution of microscale breaking waves and associated air/water dynamics, and they reveal the intimate coupling between highly intermittent airflow sheltering events, capillary waves, and turbulence below wave crests. [ABSTRACT FROM AUTHOR] |
| Copyright of Experiments in Fluids is the property of Springer Nature 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 189199261 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Wide-field-of-view PIV measurements above and below microscale breaking waves. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tondu%2C+Camille%22">Tondu, Camille</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> camille.tondu@hereon.de</i><br /><searchLink fieldCode="AR" term="%22Gade%2C+Martin%22">Gade, Martin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> martin.gade@uni-hamburg.de</i><br /><searchLink fieldCode="AR" term="%22Morales+Meabe%2C+Julián%22">Morales Meabe, Julián</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> julian.morales.meabe@studium.uni-hamburg.de</i><br /><searchLink fieldCode="AR" term="%22Buckley%2C+Marc+P%2E%22">Buckley, Marc P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> marc.buckley@hereon.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Experiments+in+Fluids%22">Experiments in Fluids</searchLink>. Nov2025, Vol. 66 Issue 11, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Particle+image+velocimetry%22">Particle image velocimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Capillary+waves%22">Capillary waves</searchLink><br /><searchLink fieldCode="DE" term="%22Laser-induced+fluorescence%22">Laser-induced fluorescence</searchLink><br /><searchLink fieldCode="DE" term="%22Wind+waves%22">Wind waves</searchLink><br /><searchLink fieldCode="DE" term="%22Boundary+layer+separation%22">Boundary layer separation</searchLink><br /><searchLink fieldCode="DE" term="%22Water+waves%22">Water waves</searchLink><br /><searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean+waves%22">Ocean waves</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Small-scale physical processes within the first centimeters above and below ocean surface waves are important for atmosphere-ocean momentum and energy budgets. The complex feedback mechanisms between airflow separation, turbulence under microscale breaking wave crests, and associated parasitic capillary waves remain to be fully understood. A new, 51-cm-wide-field-of-view laser imaging system was developed, which involves high-resolution (one velocity vector every 133 µm) air–water PIV (particle image velocimetry, 33 µm/pixel) and LIF (laser-induced fluorescence, 52 µm/pixel). The system was installed at a fetch of 15.5 m in the 24-m-long, 1-m-wide, 1.5-m-high wind-wave tank of the University of Hamburg (Germany). Wind-generated waves were examined at a reference wind speed of 4.5 m/s. The wide-field-of-view air-side PIV measurements display intense airflow separation events past waves, with sheltering effects that affect several waves downwind. Chronological sequences of air and water-side PIV measurements (11 wide-field-of-view PIV frames per second) allow us to follow the evolution of microscale breaking waves and associated air/water dynamics, and they reveal the intimate coupling between highly intermittent airflow sheltering events, capillary waves, and turbulence below wave crests. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Experiments in Fluids is the property of Springer Nature 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: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00348-025-04130-w Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: Particle image velocimetry Type: general – SubjectFull: Capillary waves Type: general – SubjectFull: Laser-induced fluorescence Type: general – SubjectFull: Wind waves Type: general – SubjectFull: Boundary layer separation Type: general – SubjectFull: Water waves Type: general – SubjectFull: Turbulence Type: general – SubjectFull: Ocean waves Type: general Titles: – TitleFull: Wide-field-of-view PIV measurements above and below microscale breaking waves. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tondu, Camille – PersonEntity: Name: NameFull: Gade, Martin – PersonEntity: Name: NameFull: Morales Meabe, Julián – PersonEntity: Name: NameFull: Buckley, Marc P. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 07234864 Numbering: – Type: volume Value: 66 – Type: issue Value: 11 Titles: – TitleFull: Experiments in Fluids Type: main |
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