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  • Experimental studies on initiation of current-induced movement of mud

    Author(s)
    Yang, Bing
    Luo, Yang
    Jeng, Dongsheng
    Feng, Jun
    Huhe, Aode
    Griffith University Author(s)
    Jeng, Dong-Sheng
    Year published
    2018
    Metadata
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    Abstract
    The initiation movement of mud exposed to currents was investigated experimentally. The initial movement of mud with different sedimentary densities was determined by measuring the flow velocity and grey level of water’s image synchronously. A new method to determine the initiation movement of mud is provided (i.e., the method of relative grey value of water’s image in the flume). The experimental results show that the initiation movement of mud can be classified as slight erosion and chunk erosion. The sediment concentration on a muddy bed is low for the slight erosion, and the variation in water’s relative grey level is ...
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    The initiation movement of mud exposed to currents was investigated experimentally. The initial movement of mud with different sedimentary densities was determined by measuring the flow velocity and grey level of water’s image synchronously. A new method to determine the initiation movement of mud is provided (i.e., the method of relative grey value of water’s image in the flume). The experimental results show that the initiation movement of mud can be classified as slight erosion and chunk erosion. The sediment concentration on a muddy bed is low for the slight erosion, and the variation in water’s relative grey level is of the order of ∼10. The sediment concentration for the chunk erosion corresponding to a jump in the curve of relative grey value clearly increases, and the variation in relative grey value at that instant is larger than 20. The critical flow velocity, critical friction velocity, and critical shear stress of initiation of movement of mud increase with the increase in deposit density.
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    Journal Title
    Applied Ocean Research
    Volume
    80
    DOI
    https://doi.org/10.1016/j.apor.2018.09.006
    Subject
    Oceanography not elsewhere classified
    Oceanography
    Civil Engineering
    Resources Engineering and Extractive Metallurgy
    Mud
    Critical flow velocity of erosion
    Shear stress of initiation movement of sediment
    Grey value
    PIV
    Publication URI
    http://hdl.handle.net/10072/381988
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    • Journal articles

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