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Rip-current generation near structures

Published online by Cambridge University Press:  21 April 2006

H. G. Wind  and
C. B. Vreugdenhil
H. G. Wind
Affiliation:
Delft Hydraulics Laboratory, Laboratory de Voorst, P.O. Box 152, 8300 AD Emmeloord, The Netherlands
C. B. Vreugdenhil
Affiliation:
Delft Hydraulics Laboratory, Laboratory de Voorst, P.O. Box 152, 8300 AD Emmeloord, The Netherlands
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Abstract

Data have been obtained for a wave-driven current system in a closed basin. Owing to interaction of the longshore current with the sidewall a strong rip current was generated. The velocity distribution over the depth of the rip current appeared to be more or less uniform. The current system has been modelled by means of a mathematical model. The effect of bottom topography, bottom friction, convection and turbulent viscosity on the current system has been investigated. The conclusions are that the rip current is dominated by convection and that the bottom topography plays a role in the convergence and divergence of the streamlines. The order of magnitude of the velocities is largely determined by the bottom-friction coefficient. The velocity field is modified by viscosity. First, turbulent viscosity entrains fluid in the longshore current and into the rip current, secondly it permits turbulent boundary layers and thirdly it is responsible for the existence of closed streamlines outside the breaker zone. Finally the model and the conclusions are extrapolated to prototype conditions.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 171 , October 1986 , pp. 459 - 476
Copyright
© 1986 Cambridge University Press

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References

Arthur R. S.1962 A note on the dynamics of rip currents. J. Geophys. Res. 67, 2777–2779.Google Scholar
Battjes J. A.1975 Modelling of turbulence in the surf zone. Symp. on Modelling Techniques, San Francisco, vol. 2, pp. 1050–1062, ASCE.
Bowen A. J.1969 Rip currents I, theoretical investigations. J. Geophys. Res. 74, 5467–5478.Google Scholar
Dalrymple R. A., Eubanks, R. A. & Birkemeyer W. A.1977 Wave induced circulation in shallow basins. Trans. ASCE WW1, 117–135.Google Scholar
Ebersole, B. A. & Dalrymple R. A.1979 A numerical model for nearshore circulation including convective accelerations and lateral mixing. Ocean Engineering rep. 21, University of Delaware, Delaware.Google Scholar
Flokstra C.1977 The closure problem for depth averaged two-dimensional flow. Publ. 150. Delft Hydraulics Laboratory.Google Scholar
James I. D.1974 A non-linear theory of Longshore Currents. Estuar. Coast. Mar. Sci. 2, 235–249.Google Scholar
Kawahara, M. & Kashiyama K.1984 Selective lumping finite element method for nearshore current. Intl J. Numer. Methods in Fluids 4, 71–97.Google Scholar
Kawahara M., Takagi, T. & Inagaki K.1980 A finite element method for nearshore current. 3rd Intl Conf. on Finite Element Methods in Flow Problems, Banff, pp. 70–79.
Liu, P. L. F. & Dalrymple, R. A. 1978 Bottom frictional stresses and longshore currents due to waves with large angles of incidence. J. Mar. Res. 36, 357–375.Google Scholar
Liu, P. L. F. & Mei C. C.1976 Water motion on a beach in the presence of a breakwater. J. Geophys. Res. 81, 3079–3094.Google Scholar
Longuet-Higgins M. S.1970 Longshore current generated by obliquely incident sea waves, 1, 2. J. Geophys. Res. 75, 6778–6801.Google Scholar
Longuet-Higgins, M. S. & Stewart R. W.1964 Radiation stress in water waves, a physical discussion with applications. Deep-Sea Res. 11, 529–562.Google Scholar
Officier M. J., Vreugdenhil, C. B. & Wind H. G.1986 Applications in hydraulics of a curvilinear finite difference method for the Navier—Stokes equations. In Recent Advances in Numerical Fluid Dynamics (ed. C. Taylor). Pineridge.
Rastogi, A. K. & Rodi W.1978 Predictions of heat and mass transfer in open channels. J. Hydraul. Div. ASCE No. Hy 3, 397–420.Google Scholar
Rodi W.1980 Turbulence models and their application in hydraulics. Institut für Hydromechanik and Sonderforschungsbereich 80, University of Karlsruhe, Karlsruhe, Germany, 104.
Ryrie S. C.1983a Longshore motion generated by obliquely incident bores. J. Fluid Mech. 129, 193–212.Google Scholar
Ryrie S. C.1983b Longshore motion due to an obliquely incident wave group. J. Fluid Mech. 137, 273–284.Google Scholar
Stive, M. J. F. & Wind H. G.1982 A study of radiation stress and set-up in the nearshore region. Coastal Engng 6, 1–25.Google Scholar
Tam C. K. W.1973 Dynamics of rip currents. J. Geophys. Res. 78, 1937–1943.Google Scholar
Visser P. J.1984 Uniform longshore current measurements and calculations. In Proc. of the 19th Coastal Engng Conf, Houston, vol. 2, pp. 2192–2208. ASCE.
Watanabe A.1982 Numerical models of nearshore currents and beach deformation. Coastal Engng Japan 25, 147–161.Google Scholar
Wu, C. S. & Liu P. L. F.1982 Finite element modelling of breaking wave induced nearshore current. In Finite Element Flow Analysis (ed. T. Kawai), pp. 579–586. North Holland.