Drag and inertia coefficients of live and surrogate shellfish dropper lines under steady and oscillatory flow
| Autor: | Arndt Hildebrandt, Nils Goseberg, Rebekka Gieschen, Nicholas Scott, Malcolm Smeaton, Bela H. Buck, Lukas Fröhling, Jannis Landmann, Kevin Heasman |
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| Rok vydání: | 2021 |
| Předmět: |
Drag coefficient
Environmental Engineering media_common.quotation_subject 020101 civil engineering Ocean Engineering 02 engineering and technology Inertia 01 natural sciences 010305 fluids & plasmas 0201 civil engineering symbols.namesake Aquaculture 0103 physical sciences 14. Life underwater Towing Shellfish media_common business.industry Reynolds number 13. Climate action Drag symbols Environmental science Submarine pipeline business Marine engineering |
| Zdroj: | EPIC3Ocean Engineering, PERGAMON-ELSEVIER SCIENCE LTD, 235(109377), pp. 1-12, ISSN: 0029-8018 |
| Popis: | 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 Cd = 1.6 for Reynolds numbers between 2.3 × 104 and 1.4 × 105. The inertia coefficient obtained from the wave tests was Cm = 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. |
| Databáze: | OpenAIRE |
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