TURBULENCE APPEARANCE AT THE BOTTOM OF A SOLITARY WAVE

Paolo Blondeaux; Jan Pralits; Giovanna Vittori

doi:10.9753/icce.v33.waves.17

No. 33 (2012), Waves

No. 33 (2012)

TURBULENCE APPEARANCE AT THE BOTTOM OF A SOLITARY WAVE

Waves

https://doi.org/10.9753/icce.v33.waves.17

Published 2012-12-15

Paolo Blondeaux⁺⁻
Jan Pralits⁺⁻
Giovanna Vittori⁺⁻

Paolo Blondeaux

University of Genoa

Jan Pralits

University of Genoa

Giovanna Vittori

University of Genoa

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Keywords

boundary layer stability
solitary waves
turbulence

How to Cite

Blondeaux, P., Pralits, J., & Vittori, G. (2012). TURBULENCE APPEARANCE AT THE BOTTOM OF A SOLITARY WAVE. Coastal Engineering Proceedings, 1(33), waves.17. https://doi.org/10.9753/icce.v33.waves.17

Abstract

The conditions leading to transition and turbulence appearance at the bottom of a solitary wave are determined by means of a linear stability analysis of the laminar flow in the bottom boundary layer. The ratio between the wave amplitude and the thickness of the viscous bottom boundary layer is assumed to be large and a 'momentary' criterion of instability is used. The results obtained show that the laminar regime becomes unstable, during the decelerating phase, if the height of the wave is larger than a threshold value which depends on the ratio between the boundary layer thickness and the local water depth. A comparison of the theoretical results with the experimental measurements of Sumer et al. (2010) seems to support the stability analysis.

https://doi.org/10.9753/icce.v33.waves.17

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References

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TURBULENCE APPEARANCE AT THE BOTTOM OF A SOLITARY WAVE

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