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    To Split or Not to Split: Dynamics of an Air Disk Formed under a Drop Impacting on a Pool

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    Type
    Article
    Authors
    Jian, Zhen cc
    Channa, Murad Ali cc
    Kherbeche, Abderrahmane cc
    Chizari, Hossain cc
    Thoroddsen, Sigurdur T cc
    Thoraval, M.-J. cc
    KAUST Department
    High-Speed Fluids Imaging Laboratory
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-05-04
    Submitted Date
    2019-01-24
    Permanent link to this record
    http://hdl.handle.net/10754/662748
    
    Metadata
    Show full item record
    Abstract
    When a drop falls and impacts on a liquid pool, it entraps an air disk below the drop, which then contracts into a central bubble. Here, we use high-speed imaging and high-resolution numerical simulations to characterize the air-disk contraction dynamics for different liquid properties. We show that the air disk can contract into a single central bubble, form a toroidal bubble, or split vertically into two smaller bubbles. We demonstrate that the transitions between the different regimes can be separated by an Ohnesorge number, Ohe, based on the air-disk thickness. For the lowest Ohe, we find a new regime, where vortex shedding from the rim of the contracting air disk breaks the vertical symmetry and prevents the bubble from splitting in two.
    Citation
    Jian, Z., Channa, M. A., Kherbeche, A., Chizari, H., Thoroddsen, S. T., & Thoraval, M.-J. (2020). To Split or Not to Split: Dynamics of an Air Disk Formed under a Drop Impacting on a Pool. Physical Review Letters, 124(18). doi:10.1103/physrevlett.124.184501
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review Letters
    DOI
    10.1103/physrevlett.124.184501
    Additional Links
    https://link.aps.org/doi/10.1103/PhysRevLett.124.184501
    ae974a485f413a2113503eed53cd6c53
    10.1103/physrevlett.124.184501
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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