Fluid-Structure Interaction (FSI) Modelling of Aquaculture Net Cage

Authors

  • O Myrli
  • H Khawaja

DOI:

https://doi.org/10.21152/1750-9548.13.1.97

Abstract

The number of good sites in less exposed locations for aquaculture farming is limited. Trends are now that the fish cages are increasing in both width and depth, as well as more weather-exposed locations, are taken into use. As the net cages continue to increase in size, so does the material costs. The design of the sea cages should be modified for safe and reliable use in remote offshore locations. Fish farms located in more exposed areas will be subject to more energetic waves and stronger currents, which will cause large net deformations. This is a challenge as fish welfare depends on a certain minimum volume within the net cage. Changing and maintaining net cages are some of the main expenses for fish farms. If the lifetime of the net cages is extended by introducing stronger, longer lasting materials, the overall costs of the nets will be reduced.

The traditional nets are produced in nylon, while the promising solid PET-wire has been introduced to the aquaculture industry. In this paper, we introduce polyurethane to the aquaculture net cages, which will be studied together with nylon and PET-wire. The study is carried out using fluid-structure interaction (FSI) simulation, computational fluid dynamics (CFD) weakly coupled with structure mechanics (FEM). ANSYS® software is employed in the study. We will look at the materials that show the most promising results for aquaculture purposes.

References

Lekang, O., Aquaculture Engineering, Second Edition. 2013: John Wiley & Sons, Ltd.

I.J. Aarhus, e.a., Kartlegging av ulike teknologiske løsninger for å møte de miljømessige utfordringene i havbruksnæringen. 2011, SINTEF.

Moe-Føre, H., et al. Structural response of high solidity net cage models in uniform flow. Journal of Fluids and Structures, 65 2016; 180-195]. https://doi.org/10.1016/j.jfluidstructs.2016.05.013

AkvaGroup. Cage Farming Aquaculture. 2016

T. Thorvaldsen, e.a., The escape of fish from Norwegian fish farms: Causes, risks and the influence of organisational aspects, in Marine Policy. 2015, Elsevier. https://doi.org/10.1016/j.marpol.2015.01.008

Moe, H., A. Fredheim, and O.S. Hopperstad. Structural analysis of aquaculture net cages in current. Journal of Fluids and Structures, 26(3) 2010; 503-516]. https://doi.org/10.1016/j.jfluidstructs.2010.01.007

Khawaja, H., Application of a 2-D approximation technique for solving stress analyses problem in FEM. The International Journal of Multiphysics, 2015. 9(4): p. 317-324. https://doi.org/10.1260/1750-9548.9.4.317

Zhao, Y.-P., et al. Numerical simulation of the flow around fishing plane nets using the porous media model. Ocean Engineering 2013 [cited 62; 25-37]. https://doi.org/10.1016/j.oceaneng.2013.01.009

Potyagaylo, S. and S.G. Loizou. Online Adaptive Geometry Predictor of Aquaculture Fish-Nets. 2014. https://doi.org/10.1109/med.2014.6961505

Khawaja, H.A., Sound waves in fluidized bed using CFD-DEM simulations. Particuology, 2018. 38: p. 126-133. https://doi.org/10.1016/j.partic.2017.07.002

Khawaja, H., et al., Quantitative Analysis of Accuracy of Voidage Computations in CFD-DEM Simulations. The Journal of Computational Multiphase Flows, 2012. 4(2): p. 183-192. https://doi.org/10.1260/1757-482x.4.2.183

Baryshev, G., H. Khawaja, and M. Moatamedi, Optimization of Particle Search Algorithm for CFD-DEM Simulations. The Journal of Computational Multiphase Flows, 2013. 5(3): p. 223-230. https://doi.org/10.1260/1757-482x.5.3.223

Khawaja, H.A., et al., Study of CRFP Shell Structures under Dynamic Loading in Shock Tube Setup. Journal of Structures, 2014. 2014: p. 6. https://doi.org/10.1155/2014/487809

Khawaja, H.A., et al., Fluid Solid Interaction Simulation of CFRP Shell Structure. Mathematics in Engineering, Science and Aerospace (MESA), 2017. 8(3): p. 311-324.

Perng, Y.-Y., Modeling Fluid Structure Interactions. 2011, ANSYS, Inc.

Harboe, T. and O.F. Skulstad. Maskeåpning, rømningsfare og fiskevelferd. 2014

goodfellow.com. Polyamide - Nylon 6 (PA 6) - Material Information. 2017; Available from: http://www.goodfellow.com/E/Polyamide-Nylon-6.html.

professionalplastics.com. Mechanical Properties of Plastic Materials. 2017

Casanova, C. and W. Dwikartika. Modeling of Aquaculture PET Net with the Use of Finite Element Method. 2013

Norge, S., Marine fish farms. Requirements for site survey, risk analyses, design, dimensioning, production, installation and operation., in Site surveys: General. 2009, Standard Norge: standard no. p. 21.

Published

2019-03-31

How to Cite

Myrli, O. and Khawaja, H. (2019) “Fluid-Structure Interaction (FSI) Modelling of Aquaculture Net Cage”, The International Journal of Multiphysics, 13(1), pp. 97-112. doi: 10.21152/1750-9548.13.1.97.

Issue

Section

Articles

Most read articles by the same author(s)

1 2 3 > >>