Theoretical and Computational Fluid Dynamics

, Volume 26, Issue 1, pp 105–116

On the role of the Chezy frictional term near the shoreline

Authors

    • INSEAN (the Italian Ship Model Basin)
  • Luciano Soldini
    • Dep. ISACUniversità Politecnica delle Marche
  • Maurizio Brocchini
    • Dep. ISACUniversità Politecnica delle Marche
Orginal Article

DOI: 10.1007/s00162-010-0220-8

Cite this article as:
Antuono, M., Soldini, L. & Brocchini, M. Theor. Comput. Fluid Dyn. (2012) 26: 105. doi:10.1007/s00162-010-0220-8

Abstract

The behavior of the Chezy frictional term near the shoreline has been studied in detail. An asymptotic analysis valid for water depths going to zero clearly shows that the use of such a term implies a non-receding motion of the shoreline. This phenomenon is induced by a thin layer of water which, because of frictional forces, remains on the beach and keeps it wet seaward of the largest run-up. However, the influence of such a frictional layer of water on the global wave motion is very weak and practically negligible for most of the swash zone flow dynamics. The existence of a non-receding shoreline has led to some clarifications on the role of some ad-hoc tools used in numerical models for the prediction of the wet/dry interface.

Keywords

Coastal engineeringChezy frictional termGravity waves

Copyright information

© Springer-Verlag 2011