Details
| Original language | English |
|---|---|
| Article number | 29 |
| Pages (from-to) | 1-20 |
| Number of pages | 20 |
| Journal | Journal of Marine Science and Engineering |
| Volume | 9 |
| Issue number | 1 |
| Publication status | Published - 30 Dec 2020 |
Abstract
The rapid growth of marine aquaculture around the world accentuates issues of sustainabil-ity and environmental impacts of large-scale farming systems. One potential mitigation strategy is to relocate to more energetic offshore locations. However, research regarding the forces which waves and currents impose on aquaculture structures in such conditions is still scarce. The present study aimed at extending the knowledge related to live blue mussels (Mytilus edulis), cultivated on dropper lines, by unique, large-scale laboratory experiments in the Large Wave Flume of the Coastal Research Center in Hannover, Germany. Nine-months-old live dropper lines and a surrogate of 2.0 m length each are exposed to regular waves with wave heights between 0.2 and 1.0 m and periods between 1.5 and 8.0 s. Force time histories are recorded to investigate the inertia and drag characteristics of live mussel and surrogate dropper lines. The surrogate dropper line was developed from 3D scans of blue mussel dropper lines, using the surface descriptor Abbott–Firestone Curve as quality parameter. Pull-off tests of individual mussels are conducted that reveal maximum attachment strength ranges of 0.48 to 10.55 N for mussels that had medium 3.04 cm length, 1.60 cm height and 1.25 cm width. Mean drag coefficients of CD = 3.9 were found for live blue mussel lines and CD = 3.4 for the surrogate model, for conditions of Keulegan–Carpenter number (KC) 10 to 380, using regular wave tests.
Keywords
- Aquaculture, Bivalves, Large Wave Flume, Physical model tests, Waves
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Ocean Engineering
Sustainable Development Goals
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In: Journal of Marine Science and Engineering, Vol. 9, No. 1, 29, 30.12.2020, p. 1-20.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Large-scale laboratory experiments on mussel dropper lines in ocean surface waves
AU - Gieschen, Rebekka
AU - Schwartpaul, Christian
AU - Landmann, Jannis
AU - Fröhling, Lukas
AU - Hildebrandt, Arndt
AU - Goseberg, Nils
N1 - Funding Information: Acknowledgments: This research was supported with funding from the New Zealand Ministry of Business, Innovation and Employment through the Cawthron Institute project CAWX1607. Furthermore, the authors gratefully thank Tim Staufenberger from Kieler Meeresfarm for providing the mussel specimen, as well as Dirk and Daniela Haase from Meerwasseraquaristik Haase for providing cooling and aeration equipment for mussel storage. We acknowledge support by the German Research Foundation and the Open Access Publication Funds of Technische Universität Braunschweig.
PY - 2020/12/30
Y1 - 2020/12/30
N2 - The rapid growth of marine aquaculture around the world accentuates issues of sustainabil-ity and environmental impacts of large-scale farming systems. One potential mitigation strategy is to relocate to more energetic offshore locations. However, research regarding the forces which waves and currents impose on aquaculture structures in such conditions is still scarce. The present study aimed at extending the knowledge related to live blue mussels (Mytilus edulis), cultivated on dropper lines, by unique, large-scale laboratory experiments in the Large Wave Flume of the Coastal Research Center in Hannover, Germany. Nine-months-old live dropper lines and a surrogate of 2.0 m length each are exposed to regular waves with wave heights between 0.2 and 1.0 m and periods between 1.5 and 8.0 s. Force time histories are recorded to investigate the inertia and drag characteristics of live mussel and surrogate dropper lines. The surrogate dropper line was developed from 3D scans of blue mussel dropper lines, using the surface descriptor Abbott–Firestone Curve as quality parameter. Pull-off tests of individual mussels are conducted that reveal maximum attachment strength ranges of 0.48 to 10.55 N for mussels that had medium 3.04 cm length, 1.60 cm height and 1.25 cm width. Mean drag coefficients of CD = 3.9 were found for live blue mussel lines and CD = 3.4 for the surrogate model, for conditions of Keulegan–Carpenter number (KC) 10 to 380, using regular wave tests.
AB - The rapid growth of marine aquaculture around the world accentuates issues of sustainabil-ity and environmental impacts of large-scale farming systems. One potential mitigation strategy is to relocate to more energetic offshore locations. However, research regarding the forces which waves and currents impose on aquaculture structures in such conditions is still scarce. The present study aimed at extending the knowledge related to live blue mussels (Mytilus edulis), cultivated on dropper lines, by unique, large-scale laboratory experiments in the Large Wave Flume of the Coastal Research Center in Hannover, Germany. Nine-months-old live dropper lines and a surrogate of 2.0 m length each are exposed to regular waves with wave heights between 0.2 and 1.0 m and periods between 1.5 and 8.0 s. Force time histories are recorded to investigate the inertia and drag characteristics of live mussel and surrogate dropper lines. The surrogate dropper line was developed from 3D scans of blue mussel dropper lines, using the surface descriptor Abbott–Firestone Curve as quality parameter. Pull-off tests of individual mussels are conducted that reveal maximum attachment strength ranges of 0.48 to 10.55 N for mussels that had medium 3.04 cm length, 1.60 cm height and 1.25 cm width. Mean drag coefficients of CD = 3.9 were found for live blue mussel lines and CD = 3.4 for the surrogate model, for conditions of Keulegan–Carpenter number (KC) 10 to 380, using regular wave tests.
KW - Aquaculture
KW - Bivalves
KW - Large Wave Flume
KW - Physical model tests
KW - Waves
UR - http://www.scopus.com/inward/record.url?scp=85099569115&partnerID=8YFLogxK
U2 - 10.3390/jmse9010029
DO - 10.3390/jmse9010029
M3 - Article
AN - SCOPUS:85099569115
VL - 9
SP - 1
EP - 20
JO - Journal of Marine Science and Engineering
JF - Journal of Marine Science and Engineering
IS - 1
M1 - 29
ER -