Time Resolved 3D3C Measurements of Shallow-water Island Wakes

    Research output: Chapter in Book/Conference paperConference paper

    1 Citation (Scopus)

    Abstract

    The wakes behind islands subjected to strong oscillating tidal flows in shallow water are characterised by highly three-dimensional flow structures and significant cycle-to-cycle variability. As part of a broader study into the processes governing vertical and cross shelf mass exchanges in the topographically complex and strongly forced Kimberley coastal region, an experimental flume (the Shallow Oscillatory Flow Flume) has been designed and constructed to obtain time resolved, three-dimensional and three-component (3D3C) velocity field measurements of island wakes. The facility makes use of the Synthetic Aperture Particle Imaging Velocimetry (SAPIV) approach, a light field imaging technique that utilises multiple cameras to digitally reconstruct a three-dimensional particle intensity field. Three-dimensional particle image velocimetry techniques are then used to obtain the velocity field. A specific advantage of SAPIV over other 3D techniques includes its unique ability to deal with occlusions, higher particle seeding densities and volume reconstruction efficiency. This paper presents a description of the experimental facility and SAPIV system setup. The three velocity component SAPIV measurements are validated against co-located and synchronised ADV measurements.

    Previous work by the authors has identified the importance of the Keulegan-Carpenter number and relative boundary layer thickness in governing the wake form of shallow islands subjected to tidal forcing. The new facility and SAPIV technique are utilised to investigate the wake form and evolution across a broad parameter range applicable to the Kimberley Region and provides a basis for quantitative model development of vertical and cross shelf mixing and exchange around islands.
    Original languageEnglish
    Title of host publicationProceedings of the 20th Australasian Fluid Mechanics Conference
    EditorsG.N. Ivey, N.L. Jones, T. Zhou
    PublisherAustralasian Fluid Mechanics Society
    Number of pages4
    ISBN (Electronic)978-1-74052-377-6
    Publication statusPublished - 5 Dec 2016
    Event20th Australasian Fluid Mechanics Conference - University of Western Australia, Perth, Australia
    Duration: 5 Dec 20168 Dec 2016
    Conference number: 20
    http://www.afms.org.au/20AFMC/

    Conference

    Conference20th Australasian Fluid Mechanics Conference
    Abbreviated titleARMC
    CountryAustralia
    CityPerth
    Period5/12/168/12/16
    Internet address

    Fingerprint

    shallow water
    oscillating flow
    three-dimensional flow
    flow structure
    particle
    seeding
    boundary layer

    Cite this

    Branson, P. M., Ghisalberti, M., & Ivey, G. N. (2016). Time Resolved 3D3C Measurements of Shallow-water Island Wakes. In G. N. Ivey, N. L. Jones, & T. Zhou (Eds.), Proceedings of the 20th Australasian Fluid Mechanics Conference [526] Australasian Fluid Mechanics Society.
    Branson, Paul M. ; Ghisalberti, Marco ; Ivey, Gregory N. / Time Resolved 3D3C Measurements of Shallow-water Island Wakes. Proceedings of the 20th Australasian Fluid Mechanics Conference. editor / G.N. Ivey ; N.L. Jones ; T. Zhou. Australasian Fluid Mechanics Society, 2016.
    @inproceedings{3abc8e8ba130438b8428597f04b5ee1c,
    title = "Time Resolved 3D3C Measurements of Shallow-water Island Wakes",
    abstract = "The wakes behind islands subjected to strong oscillating tidal flows in shallow water are characterised by highly three-dimensional flow structures and significant cycle-to-cycle variability. As part of a broader study into the processes governing vertical and cross shelf mass exchanges in the topographically complex and strongly forced Kimberley coastal region, an experimental flume (the Shallow Oscillatory Flow Flume) has been designed and constructed to obtain time resolved, three-dimensional and three-component (3D3C) velocity field measurements of island wakes. The facility makes use of the Synthetic Aperture Particle Imaging Velocimetry (SAPIV) approach, a light field imaging technique that utilises multiple cameras to digitally reconstruct a three-dimensional particle intensity field. Three-dimensional particle image velocimetry techniques are then used to obtain the velocity field. A specific advantage of SAPIV over other 3D techniques includes its unique ability to deal with occlusions, higher particle seeding densities and volume reconstruction efficiency. This paper presents a description of the experimental facility and SAPIV system setup. The three velocity component SAPIV measurements are validated against co-located and synchronised ADV measurements.Previous work by the authors has identified the importance of the Keulegan-Carpenter number and relative boundary layer thickness in governing the wake form of shallow islands subjected to tidal forcing. The new facility and SAPIV technique are utilised to investigate the wake form and evolution across a broad parameter range applicable to the Kimberley Region and provides a basis for quantitative model development of vertical and cross shelf mixing and exchange around islands.",
    author = "Branson, {Paul M.} and Marco Ghisalberti and Ivey, {Gregory N.}",
    year = "2016",
    month = "12",
    day = "5",
    language = "English",
    editor = "G.N. Ivey and N.L. Jones and T. Zhou",
    booktitle = "Proceedings of the 20th Australasian Fluid Mechanics Conference",
    publisher = "Australasian Fluid Mechanics Society",

    }

    Branson, PM, Ghisalberti, M & Ivey, GN 2016, Time Resolved 3D3C Measurements of Shallow-water Island Wakes. in GN Ivey, NL Jones & T Zhou (eds), Proceedings of the 20th Australasian Fluid Mechanics Conference., 526, Australasian Fluid Mechanics Society, 20th Australasian Fluid Mechanics Conference, Perth, Australia, 5/12/16.

    Time Resolved 3D3C Measurements of Shallow-water Island Wakes. / Branson, Paul M.; Ghisalberti, Marco; Ivey, Gregory N.

    Proceedings of the 20th Australasian Fluid Mechanics Conference. ed. / G.N. Ivey; N.L. Jones; T. Zhou. Australasian Fluid Mechanics Society, 2016. 526.

    Research output: Chapter in Book/Conference paperConference paper

    TY - GEN

    T1 - Time Resolved 3D3C Measurements of Shallow-water Island Wakes

    AU - Branson, Paul M.

    AU - Ghisalberti, Marco

    AU - Ivey, Gregory N.

    PY - 2016/12/5

    Y1 - 2016/12/5

    N2 - The wakes behind islands subjected to strong oscillating tidal flows in shallow water are characterised by highly three-dimensional flow structures and significant cycle-to-cycle variability. As part of a broader study into the processes governing vertical and cross shelf mass exchanges in the topographically complex and strongly forced Kimberley coastal region, an experimental flume (the Shallow Oscillatory Flow Flume) has been designed and constructed to obtain time resolved, three-dimensional and three-component (3D3C) velocity field measurements of island wakes. The facility makes use of the Synthetic Aperture Particle Imaging Velocimetry (SAPIV) approach, a light field imaging technique that utilises multiple cameras to digitally reconstruct a three-dimensional particle intensity field. Three-dimensional particle image velocimetry techniques are then used to obtain the velocity field. A specific advantage of SAPIV over other 3D techniques includes its unique ability to deal with occlusions, higher particle seeding densities and volume reconstruction efficiency. This paper presents a description of the experimental facility and SAPIV system setup. The three velocity component SAPIV measurements are validated against co-located and synchronised ADV measurements.Previous work by the authors has identified the importance of the Keulegan-Carpenter number and relative boundary layer thickness in governing the wake form of shallow islands subjected to tidal forcing. The new facility and SAPIV technique are utilised to investigate the wake form and evolution across a broad parameter range applicable to the Kimberley Region and provides a basis for quantitative model development of vertical and cross shelf mixing and exchange around islands.

    AB - The wakes behind islands subjected to strong oscillating tidal flows in shallow water are characterised by highly three-dimensional flow structures and significant cycle-to-cycle variability. As part of a broader study into the processes governing vertical and cross shelf mass exchanges in the topographically complex and strongly forced Kimberley coastal region, an experimental flume (the Shallow Oscillatory Flow Flume) has been designed and constructed to obtain time resolved, three-dimensional and three-component (3D3C) velocity field measurements of island wakes. The facility makes use of the Synthetic Aperture Particle Imaging Velocimetry (SAPIV) approach, a light field imaging technique that utilises multiple cameras to digitally reconstruct a three-dimensional particle intensity field. Three-dimensional particle image velocimetry techniques are then used to obtain the velocity field. A specific advantage of SAPIV over other 3D techniques includes its unique ability to deal with occlusions, higher particle seeding densities and volume reconstruction efficiency. This paper presents a description of the experimental facility and SAPIV system setup. The three velocity component SAPIV measurements are validated against co-located and synchronised ADV measurements.Previous work by the authors has identified the importance of the Keulegan-Carpenter number and relative boundary layer thickness in governing the wake form of shallow islands subjected to tidal forcing. The new facility and SAPIV technique are utilised to investigate the wake form and evolution across a broad parameter range applicable to the Kimberley Region and provides a basis for quantitative model development of vertical and cross shelf mixing and exchange around islands.

    M3 - Conference paper

    BT - Proceedings of the 20th Australasian Fluid Mechanics Conference

    A2 - Ivey, G.N.

    A2 - Jones, N.L.

    A2 - Zhou, T.

    PB - Australasian Fluid Mechanics Society

    ER -

    Branson PM, Ghisalberti M, Ivey GN. Time Resolved 3D3C Measurements of Shallow-water Island Wakes. In Ivey GN, Jones NL, Zhou T, editors, Proceedings of the 20th Australasian Fluid Mechanics Conference. Australasian Fluid Mechanics Society. 2016. 526