Details
| Original language | English |
|---|---|
| Article number | 109377 |
| Journal | Ocean engineering |
| Volume | 235 |
| Early online date | 26 Jun 2021 |
| Publication status | Published - 1 Sept 2021 |
Abstract
Against the background of a drastically increased demand of marine proteins, off-bottom, bivalve aquaculture, provides significant potential for production growth when moved into more energetic marine waters. Hence, research, industry and politics are currently proposing the development of new offshore sites. The highly energetic conditions at these sites present a challenging environment for bivalve aquaculture. In this work, physical experiments of suspended bivalves provide new knowledge on the commonly used design parameters: the drag and inertia coefficients. Live bivalves and manufactured surrogate models at a 1:1 scale were tested in a towing tank as well as under waves. The drag coefficient of live blue mussels was determined to be C d = 1.6 for Reynolds numbers between 2.3 × 10 4 and 1.4 × 10 5. The inertia coefficient obtained from the wave tests was C m = 2.1 for Keulegan Carpenter numbers KC < 10. In a pursuit to better understand the differences between live mussels and surrogates in laboratory conditions, the analysis revealed that appropriate surrogates can be identified. A method to determine the characteristic diameter of mussel dropper lines is suggested. The results facilitate the future design of aquaculture systems in high-energy environments and allow for an integration into numerical models.
Keywords
- Aquaculture engineering, Bivalves, Drag, Hydrodynamic coefficients, Inertia, Mussels, Offshore
ASJC Scopus subject areas
- Engineering(all)
- Ocean Engineering
- Environmental Science(all)
- Environmental Engineering
Sustainable Development Goals
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In: Ocean engineering, Vol. 235, 109377, 01.09.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Drag and inertia coefficients of live and surrogate shellfish dropper lines under steady and oscillatory flow
AU - Landmann, Jannis
AU - Fröhling, Lukas
AU - Gieschen, Rebekka
AU - Buck, Bela H.
AU - Heasman, Kevin
AU - Scott, Nicholas
AU - Smeaton, Malcolm
AU - Goseberg, Nils
AU - Hildebrandt, Arndt
N1 - Funding Information: This Research has been supported with funding from the New Zealand Ministry of Business, Innovation and Employment through Cawthron Institute project CAWX1607. This research has also received support from start-up funds provided by Technische Universität Braunschweig, Germany, to Prof. Nils Goseberg.
PY - 2021/9/1
Y1 - 2021/9/1
N2 - Against the background of a drastically increased demand of marine proteins, off-bottom, bivalve aquaculture, provides significant potential for production growth when moved into more energetic marine waters. Hence, research, industry and politics are currently proposing the development of new offshore sites. The highly energetic conditions at these sites present a challenging environment for bivalve aquaculture. In this work, physical experiments of suspended bivalves provide new knowledge on the commonly used design parameters: the drag and inertia coefficients. Live bivalves and manufactured surrogate models at a 1:1 scale were tested in a towing tank as well as under waves. The drag coefficient of live blue mussels was determined to be C d = 1.6 for Reynolds numbers between 2.3 × 10 4 and 1.4 × 10 5. The inertia coefficient obtained from the wave tests was C m = 2.1 for Keulegan Carpenter numbers KC < 10. In a pursuit to better understand the differences between live mussels and surrogates in laboratory conditions, the analysis revealed that appropriate surrogates can be identified. A method to determine the characteristic diameter of mussel dropper lines is suggested. The results facilitate the future design of aquaculture systems in high-energy environments and allow for an integration into numerical models.
AB - Against the background of a drastically increased demand of marine proteins, off-bottom, bivalve aquaculture, provides significant potential for production growth when moved into more energetic marine waters. Hence, research, industry and politics are currently proposing the development of new offshore sites. The highly energetic conditions at these sites present a challenging environment for bivalve aquaculture. In this work, physical experiments of suspended bivalves provide new knowledge on the commonly used design parameters: the drag and inertia coefficients. Live bivalves and manufactured surrogate models at a 1:1 scale were tested in a towing tank as well as under waves. The drag coefficient of live blue mussels was determined to be C d = 1.6 for Reynolds numbers between 2.3 × 10 4 and 1.4 × 10 5. The inertia coefficient obtained from the wave tests was C m = 2.1 for Keulegan Carpenter numbers KC < 10. In a pursuit to better understand the differences between live mussels and surrogates in laboratory conditions, the analysis revealed that appropriate surrogates can be identified. A method to determine the characteristic diameter of mussel dropper lines is suggested. The results facilitate the future design of aquaculture systems in high-energy environments and allow for an integration into numerical models.
KW - Aquaculture engineering
KW - Bivalves
KW - Drag
KW - Hydrodynamic coefficients
KW - Inertia
KW - Mussels
KW - Offshore
UR - http://www.scopus.com/inward/record.url?scp=85099581932&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2021.109377
DO - 10.1016/j.oceaneng.2021.109377
M3 - Article
VL - 235
JO - Ocean engineering
JF - Ocean engineering
SN - 0029-8018
M1 - 109377
ER -