The present paper presents the first experimental results of covariance distribution of horizontal and vertical velocities of a regular wave field. The analysis of the wave-induced currents, shear stresses, sediment transport, etc. depends on the correlation between the velocity components. Particularly, the undertow is driven by the local difference between radiation stress and the set-up pressure gradient which only balance each other in average over the depth. Turbulent shear stresses are required to maintain a steady condition. Some authors propose models on turbulence shear stresses, but measurement results which may confirm their validity are rare. This paper reports of a preliminary study aimed at comparing experimental measurements with model results.

On the Covariance of the Velocity Components in a Wave Field

Damiani, Leonardo;Mossa, Michele
1997

Abstract

The present paper presents the first experimental results of covariance distribution of horizontal and vertical velocities of a regular wave field. The analysis of the wave-induced currents, shear stresses, sediment transport, etc. depends on the correlation between the velocity components. Particularly, the undertow is driven by the local difference between radiation stress and the set-up pressure gradient which only balance each other in average over the depth. Turbulent shear stresses are required to maintain a steady condition. Some authors propose models on turbulence shear stresses, but measurement results which may confirm their validity are rare. This paper reports of a preliminary study aimed at comparing experimental measurements with model results.
27th Congress of the International Association for Hydraulic Research
0-7844-0272-8
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11589/13808
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