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Open AccessArticle

Physical Modelling of Blue Mussel Dropper Lines for the Development of Surrogates and Hydrodynamic Coefficients

Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering, Leibniz Universität Hannover, 30167 Hannover, Germany
Department of Hydromechanics and Coastal Engineering, Leichtweiß-Institute for Hydraulic Engineering and Water Resources, Technische Universität Braunschweig, 38106 Braunschweig, Germany
Cawthron Institute, 7010 Nelson, New Zealand
Alfred Wegener Institute for Polar and Marine Research, Faculty of Biosciences, Shelf Sea Systems Ecology, Marine Aquaculture, 27570 Bremerhaven, Germany
Faculty 1, Applied Marine Biology and Aquaculture, Bremerhaven University of Applied Sciences, 27568 Bremerhaven, Germany
Geodetic Institute, Leibniz Universität Hannover, 30167 Hannover, Germany
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(3), 65;
Received: 30 December 2018 / Revised: 26 February 2019 / Accepted: 6 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Selected Papers from Coastlab18 Conference)
PDF [3266 KB, uploaded 12 March 2019]
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In this work, laboratory tests with live bivalves as well as the conceptual design of additively manufactured surrogate models are presented. The overall task of this work is to develop a surrogate best fitting to the live mussels tested in accordance to the identified surface descriptor, i.e., the Abbott–Firestone Curve, and to the hydrodynamic behaviour by means of drag and inertia coefficients. To date, very few investigations have focused on loads from currents as well as waves. Therefore, tests with a towing carriage were carried out in a wave flume. A custom-made rack using mounting clamps was built to facilitate carriage-run tests with minimal delays. Blue mussels (Mytilus edulis) extracted from a site in Germany, which were kept in aerated seawater to ensure their survival for the test duration, were used. A set of preliminary results showed drag and inertia coefficients C D and C M ranging from 1.16–3.03 and 0.25 to 1.25. To derive geometrical models of the mussel dropper lines, 3-D point clouds were prepared by means of 3-D laser scanning to obtain a realistic surface model. Centered on the 3-D point cloud, a suitable descriptor for the mass distribution over the surface was identified and three 3-D printed surrogates of the blue mussel were developed for further testing. These were evaluated regarding their fit to the original 3-D point cloud of the live blue mussels via the chosen surface descriptor. View Full-Text
Keywords: aquaculture; drag; inertia; Abbott–Firestone Curve; laboratory tests aquaculture; drag; inertia; Abbott–Firestone Curve; laboratory tests

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Landmann, J.; Ongsiek, T.; Goseberg, N.; Heasman, K.; Buck, B.H.; Paffenholz, J.-A.; Hildebrandt, A. Physical Modelling of Blue Mussel Dropper Lines for the Development of Surrogates and Hydrodynamic Coefficients. J. Mar. Sci. Eng. 2019, 7, 65.

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