SIMULATION OF SAND IN PLUNGING BREAKERS
A numerical model that simulates the sediment transport due to plunging breaking waves has been developed. A plunging breaker is simulated by superimposing a jet on a non-breaking wave. The hydrodynamics are described by applying a discrete vortex model based on the mixed Eulerian-Lagrangian description of the cloud-in- cell method. Rotation is introduced in the flow where the jet impinges on the surface and in the boundary layer along the bottom. A combined diffusion-convection procedure provides a Lagrangian description of the suspended sediment. The pickup and initial suspension event in the boundary layer is simulated by a diffusion process, while the transport in the outer flow domain is simulated by convection, using the flow field provided by the hydrodynamic module. The bed-load transport is calculated by a conventional formula that relates the transport rate to the Shields parameter. A simulation over a complex bottom topography is compared to the full- scale laboratory experiments performed by Dette and Uliczka in 1986. The calculated and measured time-averaged concentration profiles show good agreement with respect to the overall concentration levels and the cross-shore distribution.
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Supplemental Notes:
- J Waterway, Port, Coastal, Ocean Engng, v 121 n 2, March/April 1995, p 77 [11 p, 21 ref, 13 fig]
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Authors:
- PEDERSEN, C
- Deigaard, R
- Publication Date: 1995
Language
- English
Subject/Index Terms
- TRT Terms: Sedimentation; Simulation; Water waves
- Uncontrolled Terms: Breaking waves; Sediment transport
- Subject Areas: Hydraulics and Hydrology; Marine Transportation;
Filing Info
- Accession Number: 00717439
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 4 1996 12:00AM