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    A Study of Three Dimensional Acoustic Scattering by Arbitrary Distribution Multibodies Using Extended Immersed Boundary Method

    Source: Journal of Vibration and Acoustics:;2014:;volume( 136 ):;issue: 003::page 34505
    Author:
    Jiang, Yongsong
    ,
    Wang, Xiaoyu
    ,
    Jing, Xiaodong
    ,
    Sun, Xiaofeng
    DOI: 10.1115/1.4026672
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A threedimensional computational model for acoustic scattering with complex geometries is presented, which employs the immersed boundary technique to deal with the effect of both hard and soft wall boundary conditions on the acoustic fields. In this numerical model, the acoustic field is solved on uniform Cartesian grids, together with simple triangle meshes to partition the immersed body surface. A direct force at the Lagrangian points is calculated from an influence matrix system, and then spreads to the neighboring Cartesian grid points to make the acoustic field satisfy the required boundary condition. This method applies a uniform stencil on the whole domain except at the computational boundary, which has the benefit of low dispersion and dissipation errors of the used scheme. The method has been used to simulate two benchmark problems to validate its effectiveness and good agreements with the analytical solutions are achieved. No matter how complex the geometries are, single body or multibodies, complex geometries do not pose any difficulty in this model. Furthermore, a simple implementation of timedomain impedance boundary condition is reported and demonstrates the versatility of the computational model.
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      A Study of Three Dimensional Acoustic Scattering by Arbitrary Distribution Multibodies Using Extended Immersed Boundary Method

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    http://yetl.yabesh.ir/yetl1/handle/yetl/156772
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    contributor authorJiang, Yongsong
    contributor authorWang, Xiaoyu
    contributor authorJing, Xiaodong
    contributor authorSun, Xiaofeng
    date accessioned2017-05-09T01:14:08Z
    date available2017-05-09T01:14:08Z
    date issued2014
    identifier issn1048-9002
    identifier othervib_136_03_034505.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/156772
    description abstractA threedimensional computational model for acoustic scattering with complex geometries is presented, which employs the immersed boundary technique to deal with the effect of both hard and soft wall boundary conditions on the acoustic fields. In this numerical model, the acoustic field is solved on uniform Cartesian grids, together with simple triangle meshes to partition the immersed body surface. A direct force at the Lagrangian points is calculated from an influence matrix system, and then spreads to the neighboring Cartesian grid points to make the acoustic field satisfy the required boundary condition. This method applies a uniform stencil on the whole domain except at the computational boundary, which has the benefit of low dispersion and dissipation errors of the used scheme. The method has been used to simulate two benchmark problems to validate its effectiveness and good agreements with the analytical solutions are achieved. No matter how complex the geometries are, single body or multibodies, complex geometries do not pose any difficulty in this model. Furthermore, a simple implementation of timedomain impedance boundary condition is reported and demonstrates the versatility of the computational model.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Study of Three Dimensional Acoustic Scattering by Arbitrary Distribution Multibodies Using Extended Immersed Boundary Method
    typeJournal Paper
    journal volume136
    journal issue3
    journal titleJournal of Vibration and Acoustics
    identifier doi10.1115/1.4026672
    journal fristpage34505
    journal lastpage34505
    identifier eissn1528-8927
    treeJournal of Vibration and Acoustics:;2014:;volume( 136 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian