Establishing patterns of change in the coefficients of reflection, transmission, and dissipation of wave energy depending on parameters of a permeable vertical wall

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.309969

Keywords:

gravity wave, permeable vertical wall, breakwater, reflection, wave transmission, wave energy dissipation

Abstract

The object of research is permeable vertical walls (breakwaters) with different degrees of permeability.

This paper reports the results of experimental research into the interaction of gravity waves with models of permeable vertical walls (breakwaters), which were formed from cylindrical piles of circular cross-section.

With the help of visual and instrumental studies, the features of interaction of surface gravity waves with permeable vertical walls of different permeability have been identified. The degree of wave transformation by these walls was also determined in the form of reflection, transmission, and dissipation coefficients of wave energy.

It was established that with a decrease in the permeability of the vertical wall and an increase in the steepness of the initial wave and a decrease in its period, the height of the reflected wave increased. The pattern of the transmitted wave height had the opposite trend.

It was determined that the wave reflection coefficient increased with a decrease in the permeability of the vertical wall and the steepness of the initial wave. The wave transmission coefficient had the opposite trend, namely, it increased with increasing wall permeability and with decreasing steepness of the initial wave. The gravity wave energy dissipation coefficient decreased with increasing vertical wall permeability, but for waves with a significant steepness hi/λ>0.038, a decrease in the wave energy dissipation coefficient was observed for walls with low permeability and the appearance of extreme values of this coefficient.

Thus, features in the interaction of surface gravity waves with permeable vertical walls (breakwaters) of different permeability have been researched and the degree of wave transformation by these walls has been determined, which could make it possible to effectively design and operate permeable vertical walls as coastal protection structures

Author Biographies

Artur Onyshchenko, National Transport University

Doctor of Technical Sciences, Professor

Department of Bridges and Tunnels and Hydrotechnical Structures

Vitalii Kovalchuk, Lviv Polytechnic National University

Doctor of Technical Sciences, Professor

Department of Railway Transport

Volodymyr Voskoboinick, Institute of Hydromechanics of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences, Senior Researcher, Head of Department

Research Department of Hydrodynamics of Wave and Channel Flows

Andrii Voskobiinyk, Institute of Hydromechanics of the National Academy of Sciences of Ukraine

PhD, Senior Researcher

Research Department of Hydrobionics and Boundary Layer Control

Sergii Aksonov, National Transport University

PhD, Associate Professor

Department of Bridges and Tunnels and Hydrotechnical Structures

Denys Trudenko, National Transport University

PhD Student

Department of Bridges and Tunnels and Hydrotechnical Structures

Serhii Hrevtsov, Lviv Polytechnic National University

PhD, Associate Professor

Department of Transport Technologies

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Establishing patterns of change in the coefficients of reflection, transmission, and dissipation of wave energy depending on parameters of a permeable vertical wall

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Published

2024-08-28

How to Cite

Onyshchenko, A., Kovalchuk, V., Voskoboinick, V., Voskobiinyk, A., Aksonov, S., Trudenko, D., & Hrevtsov, S. (2024). Establishing patterns of change in the coefficients of reflection, transmission, and dissipation of wave energy depending on parameters of a permeable vertical wall . Eastern-European Journal of Enterprise Technologies, 4(5 (130), 45–56. https://doi.org/10.15587/1729-4061.2024.309969

Issue

Vol. 4 No. 5 (130) (2024): Applied physics

Section

Applied physics

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Copyright (c) 2024 Artur Onyshchenko, Vitalii Kovalchuk, Volodymyr Voskoboinick, Andrii Voskobiinyk, Sergii Aksonov, Denys Trudenko, Serhii Hrevtsov

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