• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguideTheses and Dissertations LibguideSubmit an Item

    Statistics

    Display statistics

    Vortex-induced buckling of a viscous drop impacting a pool

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    PhysRevFluids.2.073602.pdf
    Size:
    14.03Mb
    Format:
    PDF
    Description:
    Main article
    Download
    Thumbnail
    Name:
    Figure_21_Left.avi
    Size:
    2.820Mb
    Format:
    Unknown
    Description:
    Supplemental files
    Download
    Thumbnail
    Name:
    Figure_21_Right.avi
    Size:
    5.120Mb
    Format:
    Unknown
    Description:
    Supplemental files
    Download
    Thumbnail
    Name:
    PRF_Submission_Nov2016.zip
    Size:
    51.89Mb
    Format:
    Unknown
    Description:
    Supplemental files
    Download
    Thumbnail
    Name:
    Read_Me_Movies_New.pdf
    Size:
    33.23Kb
    Format:
    PDF
    Description:
    Supplemental files
    Download
    View more filesView fewer files
    Type
    Article
    Authors
    Li, Erqiang cc
    Beilharz, Daniel
    Thoroddsen, Sigurdur T cc
    KAUST Department
    Clean Combustion Research Center
    High-Speed Fluids Imaging Laboratory
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-07-19
    Permanent link to this record
    http://hdl.handle.net/10754/625266
    
    Metadata
    Show full item record
    Abstract
    We study the intricate buckling patterns which can form when a viscous drop impacts a much lower viscosity miscible pool. The drop enters the pool by its impact inertia, flattens, and sinks by its own weight while stretching into a hemispheric bowl. Upward motion along the outer bottom surface of this bowl produces a vortical boundary layer which separates along its top and rolls up into a vortex ring. The vorticity is therefore produced in a fundamentally different way than for a drop impacting a pool of the same liquid. The vortex ring subsequently advects into the bowl, thereby stretching the drop liquid into ever thinner sheets, reaching the micron level. The rotating motion around the vortex pulls in folds to form multiple windings of double-walled toroidal viscous sheets. The axisymmetric velocity field thereby stretches the drop liquid into progressively finer sheets, which are susceptible to both axial and azimuthal compression-induced buckling. The azimuthal buckling of the sheets tends to occur on the inner side of the vortex ring, while their folds can be stretched and straightened on the outside edge. We characterize the total stretching from high-speed video imaging and use particle image velocimetry to track the formation and evolution of the vortex ring. The total interfacial area between the drop and the pool liquid can grow over 40-fold during the first 50 ms after impact. Increasing pool viscosity shows entrapment of a large bubble on top of the drop, while lowering the drop viscosity produces intricate buckled shapes, appearing at the earliest stage and being promoted by the crater motions. We also present an image collage of the most intriguing and convoluted structures observed. Finally, a simple point-vortex model reproduces some features from the experiments and shows variable stretching along the wrapping sheets.
    Citation
    Li EQ, Beilharz D, Thoroddsen ST (2017) Vortex-induced buckling of a viscous drop impacting a pool. Physical Review Fluids 2. Available: http://dx.doi.org/10.1103/physrevfluids.2.073602.
    Sponsors
    The work described herein was supported by King Abdullah University of Science and Technology (KAUST) research funding (URF/1/2621-01-01). Some of the videos in the Supplemental Material were submitted to the Gallery of Fluid Motions of the APS-DFD meeting held in Boston in November 2015. Li is grateful for the Thousand Young Talents Program of China, the National Natural Science Foundation of China (Grant No. 11621202), and the Fundamental Research Funds for the Central Universities (Grant No. WK2090050041). Beilharz was an intern at KAUST during the early phase of this work. We thank Joachim Delannoy for a helpful discussion on the modeling.
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review Fluids
    DOI
    10.1103/physrevfluids.2.073602
    Additional Links
    https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.2.073602
    ae974a485f413a2113503eed53cd6c53
    10.1103/physrevfluids.2.073602
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

    entitlement

     
    DSpace software copyright © 2002-2023  DuraSpace
    Quick Guide | Contact Us | KAUST University Library
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.