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Proceedings Paper

Damping of surface waves due to turbulence in application to the problem of ocean remote sensing
Author(s): Olga V. Shomina; Ivan A. Kapustin; Stanislav A. Ermakov
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Paper Abstract

Understanding of physical mechanisms of gravity capillary waves (GCW) damping due to an impact of turbulence is important for developing methods of ship wake remote sensing, especially for tracking and characterization of ships. Analysis of literature reveals the necessity of setting a reliable experiment to study the effect of damping of GCW due to turbulence. Available laboratory studies are based on significantly different experimental methods with some disadvantages which have caused a large scatter of experimental data. The previously proposed method, which is based on the simultaneous independent generation of surface waves and turbulence in a wave tank, is free from inherent disadvantages of previously used methods. The method is used to conduct a series of experiments in order to measure the dependence of the damping coefficient of GCW on their frequency at different intensities of turbulence in a wide frequency range. Due to the proposed technique the range of surface wavelengths is extended in order to investigate the case when the surface wavelength is comparable to the scale of turbulence. It is shown that the frequency dependence of the eddy viscosity coefficient is characterized by the presence of a maximum for both turbulent regimes. The maximum value of eddy viscosity coefficient is proportional to the velocity of turbulent pulsations. The results are discussed in application to radar imaging of turbulent ship wake.

Paper Details

Date Published: 14 October 2019
PDF: 7 pages
Proc. SPIE 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019, 111501M (14 October 2019);
Show Author Affiliations
Olga V. Shomina, Institute of Applied Physics (Russian Federation)
Ivan A. Kapustin, Institute of Applied Physics (Russian Federation)
Volga State Univ. of Water Transport (Russian Federation)
Stanislav A. Ermakov, Institute of Applied Physics (Russian Federation)
Volga State Univ. of Water Transport (Russian Federation)


Published in SPIE Proceedings Vol. 11150:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019
Charles R. Bostater Jr.; Xavier Neyt; Françoise Viallefont-Robinet, Editor(s)

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