Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D
Hydrodynamics and turbulence around net meshes have drawn more and more attention because it is closely related to forces on the structures and safety issues of offshore fish farms. In terms of numerical modeling of forces on nets, Morison or screen force model is ordinarily adopted to account for i...
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The American Society of Mechanical Engineers (ASME)
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Online Access: | https://hdl.handle.net/11250/2978697 https://doi.org/10.1115/OMAE2020-18355 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2978697 2023-05-15T14:23:47+02:00 Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D Wang, Gang Martin, Tobias Huang, Liuyi Bihs, Hans 2020 application/pdf https://hdl.handle.net/11250/2978697 https://doi.org/10.1115/OMAE2020-18355 eng eng The American Society of Mechanical Engineers (ASME) ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5: Ocean Space Utilization urn:isbn:978-0-7918-8436-2 https://hdl.handle.net/11250/2978697 https://doi.org/10.1115/OMAE2020-18355 cristin:1941111 Copyright © 2020 ASME Chapter 2020 ftntnutrondheimi https://doi.org/10.1115/OMAE2020-18355 2022-02-16T23:38:03Z Hydrodynamics and turbulence around net meshes have drawn more and more attention because it is closely related to forces on the structures and safety issues of offshore fish farms. In terms of numerical modeling of forces on nets, Morison or screen force model is ordinarily adopted to account for its hydrodynamics. However, these methodologies mainly rely on empirical experimental or cylindrical hydrodynamic coefficients, neglecting flow interactions between adjacent cruciforms or net bars. In this study, REEF3D open-source hydrodynamic toolbox is adopted to analyze flow around net meshes explicitly and investigate the hydrodynamics related to forces on the structure. The simulation accuracy is in good agreement with flume experiments and previous research. Flow velocity and vorticity around net bars and knots are investigated. The results demonstrate that 2 × 2 or 3 × 3 mesh cases are more reliable when studying turbulence around net meshes, flow interactions around adjacent net bars, knots should be taken into consideration. Two patterns to control Sn, one is to change the diameter of net bars and the other is to control length, have different effects on the flow around meshes. This paper presents a first step in the aim to derive a new empirical formula for Cd depending on Sn, and Re, which are more related to the physics in offshore conditions. publishedVersion Book Part Arctic NTNU Open Archive (Norwegian University of Science and Technology) Volume 5: Ocean Space Utilization |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Hydrodynamics and turbulence around net meshes have drawn more and more attention because it is closely related to forces on the structures and safety issues of offshore fish farms. In terms of numerical modeling of forces on nets, Morison or screen force model is ordinarily adopted to account for its hydrodynamics. However, these methodologies mainly rely on empirical experimental or cylindrical hydrodynamic coefficients, neglecting flow interactions between adjacent cruciforms or net bars. In this study, REEF3D open-source hydrodynamic toolbox is adopted to analyze flow around net meshes explicitly and investigate the hydrodynamics related to forces on the structure. The simulation accuracy is in good agreement with flume experiments and previous research. Flow velocity and vorticity around net bars and knots are investigated. The results demonstrate that 2 × 2 or 3 × 3 mesh cases are more reliable when studying turbulence around net meshes, flow interactions around adjacent net bars, knots should be taken into consideration. Two patterns to control Sn, one is to change the diameter of net bars and the other is to control length, have different effects on the flow around meshes. This paper presents a first step in the aim to derive a new empirical formula for Cd depending on Sn, and Re, which are more related to the physics in offshore conditions. publishedVersion |
format |
Book Part |
author |
Wang, Gang Martin, Tobias Huang, Liuyi Bihs, Hans |
spellingShingle |
Wang, Gang Martin, Tobias Huang, Liuyi Bihs, Hans Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
author_facet |
Wang, Gang Martin, Tobias Huang, Liuyi Bihs, Hans |
author_sort |
Wang, Gang |
title |
Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
title_short |
Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
title_full |
Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
title_fullStr |
Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
title_full_unstemmed |
Numerical Simulation of Hydrodynamics Around Net Meshes Using REEF3D |
title_sort |
numerical simulation of hydrodynamics around net meshes using reef3d |
publisher |
The American Society of Mechanical Engineers (ASME) |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2978697 https://doi.org/10.1115/OMAE2020-18355 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5: Ocean Space Utilization urn:isbn:978-0-7918-8436-2 https://hdl.handle.net/11250/2978697 https://doi.org/10.1115/OMAE2020-18355 cristin:1941111 |
op_rights |
Copyright © 2020 ASME |
op_doi |
https://doi.org/10.1115/OMAE2020-18355 |
container_title |
Volume 5: Ocean Space Utilization |
_version_ |
1766296272173531136 |