Special Issue "Hydrodynamics of Fish Cages and Floating Permeable Structures"

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (20 May 2023) | Viewed by 4341

Special Issue Editors

Laboratory for Floating Structures and Mooring Systems, School of Naval Architecture and Marine Engineering, National Technical University of Athens, Heroon Polytechniou Ave. 9, 157 73 Zografou / Athens, Greece
Interests: hydrodynamics of floating offshore structures; body–wave–current interactions; higher-order effects; mooring systems static and dynamic analysis; fish cages; fish farms; wave energy devices analysis and efficiency evaluation; arrays of devices; floating wind turbines and multi-purpose floating marine energy platforms
School of Naval Architecture and Marine Engineering, National Technical University of Athens, Heroon Polytechniou Ave. 9, 15773 Zografou / Athens, Greece
Interests: porous floating structures; wave energy converters; oscillating water column devices; mean drift second-order forces; hydrodynamics and loadings on floating structures
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Special Issue Information

Dear Colleagues,

Floating permeable structures offer a vast potential for growth. The great majority of them correspond to fish farming applications, which should be able to withstand the severe wave and current loads at installation locations. Furthermore, permeable structures are widely applied in the coastal and offshore industry for shore protection and the reduction of wave loads, whereas recently, several wind and fish farm systems have been reported in the marine sector to an early stage of application.

This Special Issue of JMSE is dedicated to recent advances in the area of floating permeable structures. The aim is to demonstrate hydrodynamic analyses of novel types of fish cages and/or fish nets, multi-purpose floating aquaculture systems, fish farms, permeable structures of arbitrary shape, etc., for offshore applications applying different types of numerical and theoretical models or state-of-the-art experimental testing.

Prof. Dr. Spyros A. Mavrakos
Dr. Dimitrios N. Konispoliatis
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • offshore aquaculture
  • fish cages
  • elastic porous bodies
  • permeable structures
  • waves and current
  • linear and no linear wave theory
  • hybrid aquaculture ocean systems

Published Papers (2 papers)

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Research

Article
Hydrodynamics of a Moored Permeable Vertical Cylindrical Body
J. Mar. Sci. Eng. 2022, 10(3), 403; https://doi.org/10.3390/jmse10030403 - 10 Mar 2022
Cited by 1 | Viewed by 1863
Abstract
In this study, the problems of diffraction and radiation of water waves by a permeable vertical cylindrical body are formulated within the realm of the linear potential theory. The body, which is floating in constant water depth, is moored with a catenary mooring [...] Read more.
In this study, the problems of diffraction and radiation of water waves by a permeable vertical cylindrical body are formulated within the realm of the linear potential theory. The body, which is floating in constant water depth, is moored with a catenary mooring line system. The method of matched eigenfunction expansions for the prediction of the velocity potential in the fluid domain surrounding the body is applied. Furthermore, the static and dynamic characteristics of the mooring system are combined with the hydrodynamics of the body, to set up the coupled motion equations of the dynamical model, i.e., floater and mooring system, in the frequency domain. Numerical results obtained through the developed solution are presented. The results revealed that porosity plays a key role in reducing/controlling the exciting wave loads. As far as the mooring system is concerned, its quasi-static and dynamic characteristics, by employing several motion directions on the fairlead in accordance to varying environmental conditions, are examined, highlighting their effect on the body’s motions. Full article
(This article belongs to the Special Issue Hydrodynamics of Fish Cages and Floating Permeable Structures)
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Article
A Semi-Analytical Model for Studying Hydroelastic Behaviour of a Cylindrical Net Cage under Wave Action
J. Mar. Sci. Eng. 2021, 9(12), 1445; https://doi.org/10.3390/jmse9121445 - 16 Dec 2021
Cited by 5 | Viewed by 1590
Abstract
In the present study, a semi-analytical model based on the small-amplitude wave theory is developed to describe the wave fields around a single gravity-type cylindrical open fish net cage. The cage may be submerged to different depths below the free-water surface. The fish [...] Read more.
In the present study, a semi-analytical model based on the small-amplitude wave theory is developed to describe the wave fields around a single gravity-type cylindrical open fish net cage. The cage may be submerged to different depths below the free-water surface. The fish cage net is modelled as a flexible porous membrane, and the deflection of the net chamber is expressed by the transverse vibration equation of strings. The velocity potential is expanded in the form of the Fourier–Bessel series and the unknown coefficients in these series are determined from matching the boundary conditions and the least squares method. The number of terms for the series solution to be used is determined from convergence studies. The model results exhibit significant hydroelastic characteristics of the net cages, including the distribution properties of wave surface, pressure drop at the net interface, structural deflection, and wave loading along the cage height. In addition, the relationships between wave forces on the net cage with hydrodynamic and structural parameters are also revealed. The findings presented herein should be useful to engineers who are designing fish cage systems. Full article
(This article belongs to the Special Issue Hydrodynamics of Fish Cages and Floating Permeable Structures)
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