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    The onset of cavitation during the collision of a sphere with a wetted surface

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    Type
    Article
    Authors
    Mansoor, Mohammad M. cc
    Uddin, Jamal
    Marston, Jeremy
    Vakarelski, Ivan Uriev cc
    Thoroddsen, Sigurdur T cc
    KAUST Department
    High-Speed Fluids Imaging Laboratory
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-01-05
    Online Publication Date
    2014-01-05
    Print Publication Date
    2014-01
    Permanent link to this record
    http://hdl.handle.net/10754/563303
    
    Metadata
    Show full item record
    Abstract
    We investigate the onset of cavitation during the collision of a sphere with a solid surface covered with a layer of Newtonian liquid. The conventional theory dictates cavitation to initiate during depressurization, i.e. when the sphere rebounds from the solid surface. Using synchronized dual-view high-speed imaging, we provide conclusive experimental evidence that confirms this scenario- namely-that cavitation occurs only after the sphere makes initial contact with the solid surface. Similar to previous experimental observations for spheres released above the liquid surface, bubbles are formed on the sphere surface during entry into the liquid layer. These were found to squeeze radially outwards with the liquid flow as the sphere approached the solid surface, producing an annular bubble structure unrelated to cavitation. In contrast, spheres released below the liquid surface did not exhibit these patterns. © Springer-Verlag Berlin Heidelberg 2014.
    Citation
    Mansoor, M. M., Uddin, J., Marston, J. O., Vakarelski, I. U., & Thoroddsen, S. T. (2014). The onset of cavitation during the collision of a sphere with a wetted surface. Experiments in Fluids, 55(1). doi:10.1007/s00348-013-1648-6
    Publisher
    Springer Nature
    Journal
    Experiments in Fluids
    DOI
    10.1007/s00348-013-1648-6
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00348-013-1648-6
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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