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Model of rough bed for numerical simulation of saltation
The present paper offers a model of rough bottom for simulation of bed load transport. In the simulation, the bed load transport or sand motion happens in the open or close conduits with averaged turbulent flow. In the model, the channel bed consists of identical spherical particles distributed in space in a special way. In the vertical direction, the particles are dispersed according to a Gaussian distribution with a definite standard deviation. In the horizontal plane, the particles have a compact hexagonal packing. Hereby, a bed structure is described by two parameters: size of bed particles and their standard deviation in the vertical direction. A simple formula is proposed connecting bed roughness with the above-mentioned bed parameters. The dependencies of averaged saltation parameters (length and height of one jump) on bed structure are obtained here.
Model of rough bed for numerical simulation of saltation
The present paper offers a model of rough bottom for simulation of bed load transport. In the simulation, the bed load transport or sand motion happens in the open or close conduits with averaged turbulent flow. In the model, the channel bed consists of identical spherical particles distributed in space in a special way. In the vertical direction, the particles are dispersed according to a Gaussian distribution with a definite standard deviation. In the horizontal plane, the particles have a compact hexagonal packing. Hereby, a bed structure is described by two parameters: size of bed particles and their standard deviation in the vertical direction. A simple formula is proposed connecting bed roughness with the above-mentioned bed parameters. The dependencies of averaged saltation parameters (length and height of one jump) on bed structure are obtained here.
Model of rough bed for numerical simulation of saltation
Kharlamova, Irina S. (author) / Vlasák, Pavel (author)
European Journal of Environmental and Civil Engineering ; 19 ; 366-385
2015-03-16
20 pages
Article (Journal)
Electronic Resource
English
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