The simulation of asteroid target fragmentation or pulverization is a challenging task that demands efficient and accurate numerical methods with large computational power. To this end, the high-order spectral difference method is implemented with graphics-processing-unit computing. Hypervelocity kinetic-energy impactors are of practical interest, which generate high-pressure deformational shock waves in the target bodies upon impact. Due to the extremely short deformation time associated with hypervelocity impact, the material behaves in a similar manner to a compressible fluid, and the compressible Euler equations can be applied. To model the multiple material interactions, an n -phase equation model is adopted into the spectral difference method. All simulations presented are solved with graphics processing units, producing solutions orders of magnitude faster than the central-processing-unit counterpart. Several impact cases are compared, including a heavy impactor and multiple impactor system, against an asteroid target. Orbital dispersion effectiveness is evaluated, and results indicate that the multiple impactor system outperforms the single heavy impactor.


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    Titel :

    Graphics-Processing-Unit-Accelerated Multiphase Computational Tool for Asteroid Fragmentation/Pulverization Simulation


    Beteiligte:
    Zimmerman, Ben J. (Autor:in) / Wie, Bong (Autor:in)

    Erschienen in:

    AIAA Journal ; 55 , 2 ; 599-609


    Erscheinungsdatum :

    2016-09-08


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch