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    Laboratory observations of double-diffusive convection using high-frequency broadband acoustics

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    RossLavery_ExF2008.pdf (1.000Mb)
    Date
    2008-09
    Author
    Ross, Tetjana  Concept link
    Lavery, Andone C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3176
    As published
    https://doi.org/10.1007/s00348-008-0570-9
    Keyword
     Double-diffusion; Broadband acoustics; Convection 
    Abstract
    High-frequency broadband (200-300 kHz) acoustic scattering techniques have been used to observe the diffusive regime of double-diffusive convection in the laboratory. Pulse compression signal processing techniques allow 1) centimetre-scale interface thickness to be rapidly, remotely, and continuously measured, 2) the evolution, and ultimate merging, of multiple interfaces to be observed at high-resolution, and 3) convection cells within the surrounding mixed layers to be observed. The acoustically measured interface thickness, combined with knowledge of the slowly-varying temperatures within the surrounding layers, in turn allows the direct estimation of double-diffusive heat and buoyancy fluxes. The acoustically derived interface thickness, interfacial fluxes and migration rates are shown to support established theory. Acoustic techniques complement traditional laboratory sampling methods and provide enhanced capabilities for observing the diffusive regime of double-diffusion in the ocean.
    Description
    Author Posting. © The Author(s), 2008. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Experiments in Fluids 46 (2009): 355-364, doi:10.1007/s00348-008-0570-9.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Preprint: Ross, Tetjana, Lavery, Andone C., "Laboratory observations of double-diffusive convection using high-frequency broadband acoustics", 2008-09, https://doi.org/10.1007/s00348-008-0570-9, https://hdl.handle.net/1912/3176
     

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