Distribution of Suspended Sediment over Wave‐Generated Ripples
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Volume 120, Issue 1
Abstract
Oscillatory flow over wave ripples is described by use of a discrete vortex model using the “cloud in cell” concept. The distribution of suspended sediment over the ripple bed is simulated by a Lagrangian model, following the track of individual sediment particles. A boundary‐layer model is used to determine the strength and the motion of the vortices very close to the ripple surface. The development of the boundary layer is described by the integrated momentum equation, assuming the boundary layer to be turbulent with a logarithmic velocity profile. In the boundary layer, turbulent diffusion is used to describe the distribution of suspended sediment. Outside the boundary layer along the ripple surface, advection with the velocity field resolved by the discrete vortex model determines the suspended‐sediment distribution. The simulated sediment concentrations are compared to measurements from the literature. The agreement between the time‐averaged simulated concentration profiles and the measurements from an oscillating water tunnel is satisfactory.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 120 • Issue 1 • January 1994
Pages: 37 - 55
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Sep 8, 1992
Published online: Jan 1, 1994
Published in print: Jan 1994
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