Sand motion induced by oscillatory flows: Sheet flow and vortex ripples

  title={Sand motion induced by oscillatory flows: Sheet flow and vortex ripples},
  author={Jan S. Ribberink and Jebbe van der Werf and T. O'Donoghue and Wael Hassan},
  journal={Journal of Turbulence},
A large series of field-scale experiments on turbulent sand-laden flows, conducted in preceding years in the LOWT and AOFT large oscillating water tunnels are reviewed and reanalysed. Using the combined experimental data sets, new insights are obtained on the detailed sand transport processes occurring in sheet-flow and ripple regime conditions. For sheet flow (i) new equations are presented relating maximum erosion depth and sheet-flow layer thickness to the maximum Shields parameter; (ii… 
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