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Etude de l'influence d'une onde sur les échelles de turbulence : Application à la houle

Abstract : In order to predict sediment movements in coastal environments, interaction between particles and turbulence must be better understood. Although previous studies have shown the importance of turbulence length scales on sediment transport for current flows, few measurements have been performed on wave/current interaction flows. So, the purpose of this thesis is to improve knowledge on wave action on these characteristic length scales which strongly affect particles path. Firstly, using LDV, we have studied turbulence length scales produced downstream of a grid in the context of a free surface current flow. Then, we have superimposed regular waves to this current. Using a new correlation technique, wave action on turbulence scales has been described. Our results particularly show a modulation of turbulence length scales by swell. We demonstrate that time dependance of turbulence properties must be taken into account to study sediment transport in coastal environments.
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https://tel.archives-ouvertes.fr/tel-00010459
Contributor : Frédéric Murzyn <>
Submitted on : Thursday, October 6, 2005 - 6:18:35 PM
Last modification on : Monday, April 27, 2020 - 4:26:29 PM
Long-term archiving on: : Friday, September 14, 2012 - 2:55:25 PM

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  • HAL Id : tel-00010459, version 1

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Frédéric Murzyn. Etude de l'influence d'une onde sur les échelles de turbulence : Application à la houle. Mécanique [physics.med-ph]. Université de Caen, 2002. Français. ⟨tel-00010459⟩

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