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Huang, Xiaohua; Liu, Haiyang; Qiyou, Tao; Yu, Hao; Wang, Shaomin; Yuan, Taiping

doi:10.4194/2618-6381-v19_1_03

Cited by 4 publications

(3 citation statements)

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“…Polythene net with the wire-netting bottom shows less shape distortion than other combinations considered [8]. A single point mooring system is studied under both waves and currents and results indicate that adding a buoy to the cage system reduces the forces on net and collar deformation [9].…”

Section: Introductionmentioning

confidence: 96%

Hydrodynamic Analysis of A Semisubmersible Fish Cage With Different Drafts Subjected to Regular Waves

Shaik,

Thuvanismail,

Chekuri

et al. 2023

Recent Experimental and Computational Research in Structural Engineering

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Cage farming has historical roots spanning centuries, while its commercialization has only commenced within the past few decades. The unsustainability of captured fish production leads to the development of the aquaculture industry. The initial practice has been carried out in ponds, rivers and later moved on into sheltered zones of the sea as a part of nearshore farming. Nowadays, farmers are keen to relocate offshore due to space constraints and pollution-related issues. This article presents a hydrodynamic analysis of the semisubmersible square fish cage with a net solidity of 0.26 subjected to regular waves. The cage is studied numerically under different drafts of 17.5cm, 26.25cm and 35cm under regular waves with a water depth of 55cm. Frequency and time domain analyses are performed to investigate the hydrodynamic characteristics of the cage. Each case's motion responses and anchor line tension are studied and results are analysed. The results indicate that the increase in draft depths leads to decreased motion responses and anchor line tensions. The cage behaves well in three different submerged conditions and shows better performance at the draft of 35cm.

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Section: Introductionmentioning

confidence: 96%

Hydrodynamic Analysis of A Semisubmersible Fish Cage With Different Drafts Subjected to Regular Waves

Shaik,

Thuvanismail,

Chekuri

et al. 2023

Recent Experimental and Computational Research in Structural Engineering

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“…The lumped-mass method, proposed by [5], modeled the effects of drag, inertia, weight, buoyancy, and net elasticity. The model was validated and applied to several fish farm configurations with different environmental forcing [6][7][8][9][10][11][12][13][14][15]. The net-truss model, originally presented by [16], simulated the net with straight trusses connecting nodes.…”

Section: Introductionmentioning

confidence: 99%

“…validated and applied to several fish farm configurations with different environmental forcing [6][7][8][9][10][11][12][13][14][15]. The net-truss model, originally presented by [16], simulated the net with straight trusses connecting nodes.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Results on the Dynamics of a Pile-Moored Fish Cage with Elastic Net in Currents and Waves

Zitti

Novelli

Brocchini

2020

JMSE

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Over the last decades, the aquaculture sector increased significantly and constantly, moving fish-farm plants further from the coast, and exposing them to increasingly high forces due to currents and waves. The performances of cages in currents and waves have been widely studied in literature, by means of laboratory experiments and numerical models, but virtually all the research is focused on the global performances of the system, i.e., on the maximum displacement, the volume reduction or the mooring tension. In this work we propose a numerical model, derived from the net-truss model of Kristiansen and Faltinsen (2012), to study the dynamics of fish farm cages in current and waves. In this model the net is modeled with straight trusses connecting nodes, where the mass of the net is concentrated at the nodes. The deformation of the net is evaluated solving the equation of motion of the nodes, subjected to gravity, buoyancy, lift, and drag forces. With respect to the original model, the elasticity of the net is included. In this work the real size of the net is used for the computation mesh grid, this allowing the numerical model to reproduce the exact dynamics of the cage. The numerical model is used to simulate a cage with fixed rings, based on the concept of mooring the cage to the foundation of no longer functioning offshore structures. The deformations of the system subjected to currents and waves are studied.

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