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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Blondeaux, Paolo Vittori, Giovanna and Mazzuoli, Marco 2016. Pattern formation in a thin layer of sediment. Marine Geology, Vol. 376, p. 39.

    Blondeaux, Paolo 2012. Sediment mixtures, coastal bedforms and grain sorting phenomena: An overview of the theoretical analyses. Advances in Water Resources, Vol. 48, p. 113.

    Blondeaux, Paolo and Vittori, Giovanna 2014. The flow over bedload sheets and sorted bedforms. Continental Shelf Research, Vol. 85, p. 9.

    Carstensen, S. Sumer, B. M. and Fredso̸e, J. 2012. A note on turbulent spots over a rough bed in wave boundary layers. Physics of Fluids, Vol. 24, Issue. 11, p. 115104.

    Mazzuoli, Marco Seminara, Giovanni and Vittori, Giovanna 2014. Settling of heavy particles in a turbulent Stokes layer: Numerical simulations. Advances in Water Resources, Vol. 72, p. 2.

    Mujal-Colilles, Anna Christensen, Kenneth T. Bateman, Allen and Garcia, Marcelo H. 2016. Coherent structures in oscillatory flows within the laminar-to-turbulent transition regime for smooth and rough walls. Journal of Hydraulic Research, Vol. 54, Issue. 5, p. 502.

  • Journal of Fluid Mechanics, Volume 685
  • October 2011, pp. 365-376

Turbulent spots in oscillatory boundary layers

  • Marco Mazzuoli (a1), Giovanna Vittori (a1) and Paolo Blondeaux (a1)
  • DOI:
  • Published online: 19 September 2011

Detailed knowledge of the dynamics of vortex structures in an oscillatory boundary layer is essential for the correct modelling of transport processes in many engineering problems and, in particular, of the pick-up and transport of sediments at the bottom of sea waves. In the present contribution, the formation of turbulent spots in an oscillatory boundary layer is investigated by means of direct numerical simulations. Two of the laboratory experiments of Carstensen, Sumer and Fredsøe are reproduced and, after a comparison of the numerical results with laboratory measurements, a detailed and quantitative characterization of the turbulent spots is also given on the basis of further simulations. The speeds of the head () and tail () of the spots are found to scale with the instantaneous free stream velocity and to be similar to those observed in steady boundary layers. The ratios and seem to increase with the Reynolds number () while the streamwise expansion rate of the spots appears to be independent of .

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4.A. G. Davies , J. S. Ribberinkb , A. Temperville & J. A. Zyserman 1997 Comparisons between sediment transport models and observations made in wave and current flows above plane beds. Coast. Engng 31, 163198.

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13.B. A. Singer 1996 Characteristics of a young turbulent spot. Phys. Fluids 8 (2), 509521.

14.G. Vittori 2003 Sediment suspension due to waves. J. Geophys. Res. 108 (6), 3173.

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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
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