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    Equivalent Roughness of Submerged Obstacles in Open-Channel Flows

    Experimental results for flow in a 16.5% sloping channel over various kinds of submerged artificial large-scale roughness elements are presented. Eight different shapes of obstacles are tested, as follows: (1) standard baffle blocks, (2) cubes, (3) half-cubes, (4) angles, (5) cylinders, (6) vertical rods, (7) hemispheres parallel to the flow, and (8) hemispheres normal to the flow. Based on depth measurements, the effective Manning’s coefficient is determined and the respective equivalent sand roughness is evaluated. The results are given in nondimensional terms and compared with previous research. The effects of shape, size, and density of the obstacles on flow resistance are discussed.

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    Equivalent Roughness of Submerged Obstacles in Open-Channel Flows

    Experimental results for flow in a 16.5% sloping channel over various kinds of submerged artificial large-scale roughness elements are presented. Eight different shapes of obstacles are tested, as follows: (1) standard baffle blocks, (2) cubes, (3) half-cubes, (4) angles, (5) cylinders, (6) vertical rods, (7) hemispheres parallel to the flow, and (8) hemispheres normal to the flow. Based on depth measurements, the effective Manning’s coefficient is determined and the respective equivalent sand roughness is evaluated. The results are given in nondimensional terms and compared with previous research. The effects of shape, size, and density of the obstacles on flow resistance are discussed.

    Access

    Check access
    Check availability in my library
    Order at Subito €

    Equivalent Roughness of Submerged Obstacles in Open-Channel Flows

    Experimental results for flow in a 16.5% sloping channel over various kinds of submerged artificial large-scale roughness elements are presented. Eight different shapes of obstacles are tested, as follows: (1) standard baffle blocks, (2) cubes, (3) half-cubes, (4) angles, (5) cylinders, (6) vertical rods, (7) hemispheres parallel to the flow, and (8) hemispheres normal to the flow. Based on depth measurements, the effective Manning’s coefficient is determined and the respective equivalent sand roughness is evaluated. The results are given in nondimensional terms and compared with previous research. The effects of shape, size, and density of the obstacles on flow resistance are discussed.

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    Title:

    Equivalent Roughness of Submerged Obstacles in Open-Channel Flows

    Contributors:

    Christodoulou, George C. (author)

    Published in:

    Journal of Hydraulic Engineering ; 140 ; 226-230

    Publication date:

    2013-07-04

    Size:

    52014-01-01 pages

    ISSN:

    0733-9429 , 1943-7900

    DOI:

    https://doi.org/10.1061/(ASCE)HY.1943-7900.0000801

    Type of media:

    Article (Journal)

    Type of material:

    Electronic Resource

    Language:

    Unknown

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