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    Numerical Alternatives in Transient Stream Response

    Source: Journal of Hydraulic Engineering:;1984:;Volume ( 110 ):;issue: 006
    Author:
    Rodney J. Sobey
    DOI: 10.1061/(ASCE)0733-9429(1984)110:6(749)
    Publisher: American Society of Civil Engineers
    Abstract: A fundamental problem in the numerical prediction of transient stream response is identified as grid resolution. As it is unrealistic to expect predictive performance beyond the Nyquist limit, a successful algorithm must involve a compromise between adequate resolution and acceptable computational effort. Difficulties are rarely encountered in the numerical estimation of the hydrodynamic response, but serious numerical dispersion and solution oscillations frequently corrupt numerical estimates of the mass transport response. The numerical solution difficulties are traced to the discrete approximation to the convective term in an Eulerian framework, regardless of the numerical method adopted. The impact of grid resolution is quantified by Fourier response factor computations and numerical experiments for typical algorithms. Higher order nodal continuity and moving coordinate systems are identified as appropriate solution techniques for the mass transport response, the moving coordinate system approach being shown to be particularly attractive.
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      Numerical Alternatives in Transient Stream Response

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    contributor authorRodney J. Sobey
    date accessioned2017-05-08T20:39:00Z
    date available2017-05-08T20:39:00Z
    date copyrightJune 1984
    date issued1984
    identifier other%28asce%290733-9429%281984%29110%3A6%28749%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/22344
    description abstractA fundamental problem in the numerical prediction of transient stream response is identified as grid resolution. As it is unrealistic to expect predictive performance beyond the Nyquist limit, a successful algorithm must involve a compromise between adequate resolution and acceptable computational effort. Difficulties are rarely encountered in the numerical estimation of the hydrodynamic response, but serious numerical dispersion and solution oscillations frequently corrupt numerical estimates of the mass transport response. The numerical solution difficulties are traced to the discrete approximation to the convective term in an Eulerian framework, regardless of the numerical method adopted. The impact of grid resolution is quantified by Fourier response factor computations and numerical experiments for typical algorithms. Higher order nodal continuity and moving coordinate systems are identified as appropriate solution techniques for the mass transport response, the moving coordinate system approach being shown to be particularly attractive.
    publisherAmerican Society of Civil Engineers
    titleNumerical Alternatives in Transient Stream Response
    typeJournal Paper
    journal volume110
    journal issue6
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)0733-9429(1984)110:6(749)
    treeJournal of Hydraulic Engineering:;1984:;Volume ( 110 ):;issue: 006
    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
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