SHEAR STRESSES AND MEAN FLOW IN SHOALING AND BREAKING WAVES

Marcel J.F. Stive; Huib J. De Vriend

doi:10.9753/icce.v24.%p

No. 24 (1994), Conference Proceedings

No. 24 (1994)

SHEAR STRESSES AND MEAN FLOW IN SHOALING AND BREAKING WAVES

Conference Proceedings

https://doi.org/10.9753/icce.v24.%25p

Published 1994-01-29

Marcel J.F. Stive⁺⁻
Huib J. De Vriend⁺⁻

Marcel J.F. Stive

Netherlands Centre for Coastal Research, Delft University of Technology

Huib J. De Vriend

University of Twente, Section Civil Engineering and Management

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Keywords

shear stress
shoaling
breaking waves
mean flow

How to Cite

Stive, M. J., & De Vriend, H. J. (1994). SHEAR STRESSES AND MEAN FLOW IN SHOALING AND BREAKING WAVES. Coastal Engineering Proceedings, 1(24). https://doi.org/10.9753/icce.v24.%p

Abstract

We investigate the vertical, wave averaged distributions of shear stresses and Eulerian flow in normally incident, shoaling and breaking waves. It is found that shear stresses are solely due to wave amplitude variations, which can be caused by shoaling, boundary layer dissipation and/or breaking wave dissipation. The resulting shear stress and mean flow distributions for these cases are derived, and compared with earlier work. The attractive, now frequently used modelling choice of specifying a shear stress at the mean surface level is discussed in the context of the constituent equations and related boundary conditions and constraints. A derivation of the shear stress at the mean surface level is given both by using the momentum balance and energy balance equations, which is shown to lead to the same result, if the effects of a changing roller are incorporated correctly3'. Finally, matching solutions for the shoaling and breaking wave cases between the boundary layer and the middle layer for the shear stresses and the wave averaged flow are derived.

https://doi.org/10.9753/icce.v24.%25p

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SHEAR STRESSES AND MEAN FLOW IN SHOALING AND BREAKING WAVES

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