Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt
The characteristic current flow field around a 55 m deep full-scale stocked conical Atlantic salmon sea-cage equipped with a 10 m permeable skirt was studied experimentally using acoustic Doppler velocimeters and profilers. The weakest current speed was inside the cage at 6 m depth and the highest r...
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2021
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Online Access: | https://hdl.handle.net/11250/2729792 https://doi.org/10.1016/j.oceaneng.2021.108639 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2729792 2023-05-15T15:32:19+02:00 Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt Jonsdottir, Kristbjørg Edda Pascal, Klebert Volent, Zsolt Alfredsen, Jo Arve 2021 application/pdf https://hdl.handle.net/11250/2729792 https://doi.org/10.1016/j.oceaneng.2021.108639 eng eng Elsevier urn:issn:0029-8018 https://hdl.handle.net/11250/2729792 https://doi.org/10.1016/j.oceaneng.2021.108639 cristin:1870770 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY Ocean Engineering Peer reviewed Journal article 2021 ftntnutrondheimi https://doi.org/10.1016/j.oceaneng.2021.108639 2021-02-24T23:34:37Z The characteristic current flow field around a 55 m deep full-scale stocked conical Atlantic salmon sea-cage equipped with a 10 m permeable skirt was studied experimentally using acoustic Doppler velocimeters and profilers. The weakest current speed was inside the cage at 6 m depth and the highest reduction downstream was recorded behind the shielded volume. Downstream of the cage the reduction in speed became little to non-existing at 22 m depth, probably due to the decreasing diameter of the cage with depth. To reduction in current speed through the cage was compared with estimated reduction from theoretical expressions. The results compared reasonably well downstream of the shielded cage, while the reduction inside the cage was higher than the estimates. The difference in current flow field behind a conical cage compared with a cylindrical cage may have implications for the dispersal of waste, feed pellets and microorganisms from the cage influencing the benthic impact of the farm. publishedVersion /© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Article in Journal/Newspaper Atlantic salmon NTNU Open Archive (Norwegian University of Science and Technology) Ocean Engineering 223 108639 |
institution |
Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
The characteristic current flow field around a 55 m deep full-scale stocked conical Atlantic salmon sea-cage equipped with a 10 m permeable skirt was studied experimentally using acoustic Doppler velocimeters and profilers. The weakest current speed was inside the cage at 6 m depth and the highest reduction downstream was recorded behind the shielded volume. Downstream of the cage the reduction in speed became little to non-existing at 22 m depth, probably due to the decreasing diameter of the cage with depth. To reduction in current speed through the cage was compared with estimated reduction from theoretical expressions. The results compared reasonably well downstream of the shielded cage, while the reduction inside the cage was higher than the estimates. The difference in current flow field behind a conical cage compared with a cylindrical cage may have implications for the dispersal of waste, feed pellets and microorganisms from the cage influencing the benthic impact of the farm. publishedVersion /© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
format |
Article in Journal/Newspaper |
author |
Jonsdottir, Kristbjørg Edda Pascal, Klebert Volent, Zsolt Alfredsen, Jo Arve |
spellingShingle |
Jonsdottir, Kristbjørg Edda Pascal, Klebert Volent, Zsolt Alfredsen, Jo Arve Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
author_facet |
Jonsdottir, Kristbjørg Edda Pascal, Klebert Volent, Zsolt Alfredsen, Jo Arve |
author_sort |
Jonsdottir, Kristbjørg Edda |
title |
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
title_short |
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
title_full |
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
title_fullStr |
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
title_full_unstemmed |
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
title_sort |
characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2729792 https://doi.org/10.1016/j.oceaneng.2021.108639 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Ocean Engineering |
op_relation |
urn:issn:0029-8018 https://hdl.handle.net/11250/2729792 https://doi.org/10.1016/j.oceaneng.2021.108639 cristin:1870770 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.oceaneng.2021.108639 |
container_title |
Ocean Engineering |
container_volume |
223 |
container_start_page |
108639 |
_version_ |
1766362828231409664 |