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    A Positive-Definite Cut-Cell Method for Strong Two-Way Coupling Between Fluids and Deformable Bodies

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    Date
    2017
    Author
    Zarifi, Omar
    Batty, Christopher ORCID
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    Abstract
    We present a new approach to simulation of two-way coupling between inviscid free surface fluids and deformable bodies that exhibits several notable advantages over previous techniques. By fully incorporating the dynamics of the solid into pressure projection, we simultaneously handle fluid incompressibility and solid elasticity and damping. Thanks to this strong coupling, our method does not su er from instability, even in very taxing scenarios. Furthermore, use of a cut-cell discretization methodology allows us to accurately apply proper free-slip boundary conditions at the exact solid-fluid interface. Consequently, our method is capable of correctly simulating inviscid tangential flow, devoid of grid artefacts or arti cial sticking. Lastly, we present an e cient algebraic transformation to convert the inde nite coupled pressure projection system into a positive-de nite form.We demonstrate the e cacy of our proposed method by simulating several interesting scenarios, including a light bath toy colliding with a collapsing column of water, liquid being dropped onto a deformable platform, and a partially liquid- lled deformable elastic sphere bouncing.
    BibTeX
    @inproceedings {10.1145:3099564.3099572,
    booktitle = {Eurographics/ ACM SIGGRAPH Symposium on Computer Animation},
    editor = {Bernhard Thomaszewski and KangKang Yin and Rahul Narain},
    title = {{A Positive-Definite Cut-Cell Method for Strong Two-Way Coupling Between Fluids and Deformable Bodies}},
    author = {Zarifi, Omar and Batty, Christopher},
    year = {2017},
    publisher = {ACM},
    ISSN = {1727-5288},
    ISBN = {978-1-4503-5091-4},
    DOI = {10.1145/3099564.3099572}
    }
    URI
    http://dx.doi.org/10.1145/3099564.3099572
    https://diglib.eg.org:443/handle/10.1145/3099564-3099572
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    Eurographics Association copyright © 2013 - 2022 
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