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    Simplified versus Detailed Two-Dimensional Approaches to Transient Flow Modeling in Urban Areas

    Source: Journal of Hydraulic Engineering:;2010:;Volume ( 136 ):;issue: 004
    Author:
    G. Petaccia
    ,
    S. Soares-Frazão
    ,
    F. Savi
    ,
    L. Natale
    ,
    Y. Zech
    DOI: 10.1061/(ASCE)HY.1943-7900.0000154
    Publisher: American Society of Civil Engineers
    Abstract: Simplified and detailed two-dimensional modeling approaches to transient flows in urban areas, based on finite-volume solution of the shallow water equations, are compared. Through the example of a dam-break flow in a simplified urban district for which accurate laboratory data exist, various methods are compared: (1) the solution of the two-dimensional shallow water equations with a detailed meshing of each street; (2) the use of a porosity concept to represent the reduction of water-storage and conveyance in the urban area; and (3) the representation of urban areas as zones with higher friction coefficient. Accuracy and adequacy of each method are assessed through comparison with the experiments. Among the simplified models, the porosity approach seems to be the most adequate as head losses at the entrance and the exit of the city are considered.
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      Simplified versus Detailed Two-Dimensional Approaches to Transient Flow Modeling in Urban Areas

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    http://yetl.yabesh.ir/yetl1/handle/yetl/63984
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    contributor authorG. Petaccia
    contributor authorS. Soares-Frazão
    contributor authorF. Savi
    contributor authorL. Natale
    contributor authorY. Zech
    date accessioned2017-05-08T21:50:42Z
    date available2017-05-08T21:50:42Z
    date copyrightApril 2010
    date issued2010
    identifier other%28asce%29hy%2E1943-7900%2E0000181.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/63984
    description abstractSimplified and detailed two-dimensional modeling approaches to transient flows in urban areas, based on finite-volume solution of the shallow water equations, are compared. Through the example of a dam-break flow in a simplified urban district for which accurate laboratory data exist, various methods are compared: (1) the solution of the two-dimensional shallow water equations with a detailed meshing of each street; (2) the use of a porosity concept to represent the reduction of water-storage and conveyance in the urban area; and (3) the representation of urban areas as zones with higher friction coefficient. Accuracy and adequacy of each method are assessed through comparison with the experiments. Among the simplified models, the porosity approach seems to be the most adequate as head losses at the entrance and the exit of the city are considered.
    publisherAmerican Society of Civil Engineers
    titleSimplified versus Detailed Two-Dimensional Approaches to Transient Flow Modeling in Urban Areas
    typeJournal Paper
    journal volume136
    journal issue4
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)HY.1943-7900.0000154
    treeJournal of Hydraulic Engineering:;2010:;Volume ( 136 ):;issue: 004
    contenttypeFulltext
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