Design and Hydrodynamic Modeling for Aquaculture Technology at Open-Sea

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

Deadline for manuscript submissions: closed (20 October 2023) | Viewed by 4293

Special Issue Editor


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Guest Editor
Faculty of Mechanical Engineering, Technion, Haifa 32000, Israel
Interests: design in marine environment; waves–structure interactions; naval architecture; offshore aquaculture engineering; structural analysis

Special Issue Information

Dear Colleagues,

Aquaculture is the fastest-growing sector of animal food production, and open-sea aquaculture especially presents a great vision as a source of human nutrition. Competition for protected waters by other commercial interests and the increasing awareness of environmental aspects encourage the development of open-sea aquaculture farms. In spite of these motivations, commercial open-sea aquaculture farms are few in number. Open-sea aquaculture farms need to survive and function at high sea loads, keep their space in the cages, and provide a suitable growing habitat for organism.

The purpose of this Special Issue is to present new design concepts, as well as new and improved design and analysis methods, with the aim of professionalizing and advancing the development of environmentally friendly technologies in open-sea aquaculture.

Dr. Nitai Drimer
Guest Editor

Manuscript Submission Information

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Keywords

  • open-sea aquaculture
  • design and analysis of aquaculture farms
  • waves and current loads and load effects

Published Papers (3 papers)

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Research

22 pages, 12608 KiB  
Article
Numerical Study on Internal and External Flow Fields of the UHMWPE Cage
by Yiyang Hu, Haisheng Zhao, Wei Shi, Chunwei Bi and Xin Li
J. Mar. Sci. Eng. 2023, 11(10), 1881; https://doi.org/10.3390/jmse11101881 - 27 Sep 2023
Cited by 1 | Viewed by 928
Abstract
Ultra-high molecular weight polyethylene (UHMWPE) is a new kind of fishing gear material applied in deep-sea fishing cages, which is becoming a trend. Studies on the internal and external flow fields of cages made of UHMWPE have been scarce previously. Therefore, a three-dimensional [...] Read more.
Ultra-high molecular weight polyethylene (UHMWPE) is a new kind of fishing gear material applied in deep-sea fishing cages, which is becoming a trend. Studies on the internal and external flow fields of cages made of UHMWPE have been scarce previously. Therefore, a three-dimensional numerical model for the UHMWPE cage is established herein, where the cage is modeled by a porous media model. The Darcy–Forchheimer coefficients of the porous media are obtained by physical model experiments and numerical simulations. Then, the cylindrical cage is divided into 16 planar nets circumferentially, along with an additional bottom net, to investigate its internal and external flow fields numerically. For a single cylindrical cage, the degree of deceleration decreases as the flow velocity increases, and this effect becomes less apparent when the flow velocity reaches a certain threshold. Finally, the flow field characteristics of double cages with different spacing and multiple cages with equal spacing are revealed. Full article
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22 pages, 10955 KiB  
Article
Design and Analysis of a Sub-Surface Longline Marine Aquaculture Farm for Co-Existence with Offshore Wind Farm
by Sung Youn Boo, Steffen Allan Shelley, Seung-Ho Shin, Jiyong Park and Yoon-Jin Ha
J. Mar. Sci. Eng. 2023, 11(5), 1034; https://doi.org/10.3390/jmse11051034 - 12 May 2023
Viewed by 1392
Abstract
There has been growing interest recently in hybrid installations integrating the offshore wind farm and aquaculture farm as co-existence while optimizing ocean space use. The offshore marine farms beyond coastal or sheltered areas will require mooring to ensure the station-keeping of the farm [...] Read more.
There has been growing interest recently in hybrid installations integrating the offshore wind farm and aquaculture farm as co-existence while optimizing ocean space use. The offshore marine farms beyond coastal or sheltered areas will require mooring to ensure the station-keeping of the farm system during the storms. In the present work, a sub-surface longline farm is installed in a fixed offshore wind farm at a distance from the wind foundations. The farm is designed to cultivate oysters in multi-compartment bags attached to the longlines vertically. The farm with a cultivating area of 200 m × 200 m is supported by the various farm lines made of polypropylene and buoys that is moored with catenary mooring arrangements. Drag coefficients of a full-scale oyster bag in wave and current are determined using the results of wave basin tests. A lumped model is developed and validated with a complete model for a partial farm. The lumped model is used to simulate the coupled responses of the whole farm in the site extreme waves and currents of a 50-year return period. The strength and fatigue designs of the mooring and farm lines are evaluated against the industry standards and confirmed to comply with the design requirements. Full article
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22 pages, 7297 KiB  
Article
The Hydrostatic Buckling of SPM Systems of Fish Cages and a Design Method to Prevent It
by Guy Mont and Nitai Drimer
J. Mar. Sci. Eng. 2023, 11(3), 538; https://doi.org/10.3390/jmse11030538 - 2 Mar 2023
Viewed by 1353
Abstract
This study presents an inherent buckling issue of SPM (Single Point Mooring) systems for open sea aquaculture and a design method to analyze and solve this issue. The SPM arrangement of a row of cages is very efficient, as it minimizes the anchoring [...] Read more.
This study presents an inherent buckling issue of SPM (Single Point Mooring) systems for open sea aquaculture and a design method to analyze and solve this issue. The SPM arrangement of a row of cages is very efficient, as it minimizes the anchoring load by masking of the current applied to the downstream cages, hence saves anchors and mooring lines. However, a sudden reversal of the current direction presents a risk of buckling of the row of cages, if it applies a compression load along the array of cages before rotation of the entire cage system takes place. This study presents the concept of Hydrostatic Buckling of a row of cages and a method of design and analysis to control the stability of the system at the situation of sudden current reversal. First, a simple method for preliminarily assessment by applying the principle of virtual work is formulated. Then, an analysis of the structure by a parametric finite elements code is presented. The reversal current limits for the stability of the structure, are parametrically studied, by the analyses of two hypothetical practical scenarios. This study presents practical design tools and results, such as the method of the analysis, simplified loading states for representing the critical events, the scantlings of the structure, as well as guidelines for designing a SPM system of cages that withstand critical situations of reversal current. Full article
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