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Turbulence Modelling and the Effects of Directional Random Waves in Computations of Nearshore Circulation

In: Numerical Techniques for Engineering Analysis and Design

Author

Listed:
  • K. Anastasiou

    (Imperial College of Science and Technology, Department of Civil Engineering)

  • P. Dong

    (Imperial College of Science and Technology, Department of Civil Engineering)

  • D. J. Walker

    (Imperial College of Science and Technology, Department of Civil Engineering)

Abstract

Summary The computation of nearshore, wave induced, circulation is currently receiving considerable attention owing to its importance in studies of sediment and pollutant transport in coastal environments. However, the modelling of turbulence in the surf zone is not generally as advanced as that found in other branches of applied fluid mechanics. Moreover, the randomness and directionality of the wave motion is not usually taken into account, the solutions corresponding to monochromatic and uni-directional waves. This paper implements three models of turbulence in the surf zone and presents results which show the degree to which the computed features of the flow depend on the type of turbulence model used. Similar comparisons are made with regard to the distribution of the alongshore current over a plane beach. By using linear superposition the random and three-dimensional character of the waves is also taken into account, and it is demonstrated that the computed flow fields differ significantly from those corresponding to monochromatic waves.

Suggested Citation

  • K. Anastasiou & P. Dong & D. J. Walker, 1987. "Turbulence Modelling and the Effects of Directional Random Waves in Computations of Nearshore Circulation," Springer Books, in: G. N. Pande & J. Middleton (ed.), Numerical Techniques for Engineering Analysis and Design, chapter 0, pages 207-215, Springer.
    • Handle: RePEc:spr:sprchp:978-94-009-3653-9_24
    DOI: 10.1007/978-94-009-3653-9_24
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