Drag coefficients of vertically-mounted full-scale blue mussel dropper lines

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • Arndt Hildebrandt
  • Jannis Landmann
  • Thorsten Ongsiek
  • Nils Goseberg
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Details

Original languageEnglish
Title of host publication Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018
PublisherAmerican Society of Mechanical Engineers(ASME)
Volume7A: Ocean Engineering
ISBN (electronic)9780791851265
Publication statusPublished - 2018
EventASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 - Madrid, Spain
Duration: 17 Jun 201822 Jun 2018

Abstract

Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.

Keywords

    Aquaculture, Drag coefficient, Dropper lines, Morison equation, Physical modelling

ASJC Scopus subject areas

Cite this

Drag coefficients of vertically-mounted full-scale blue mussel dropper lines. / Hildebrandt, Arndt; Landmann, Jannis; Ongsiek, Thorsten et al.
Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018. Vol. 7A: Ocean Engineering American Society of Mechanical Engineers(ASME), 2018.

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Hildebrandt, A, Landmann, J, Ongsiek, T & Goseberg, N 2018, Drag coefficients of vertically-mounted full-scale blue mussel dropper lines. in Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018. vol. 7A: Ocean Engineering, American Society of Mechanical Engineers(ASME), ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain, 17 Jun 2018.
Hildebrandt, A., Landmann, J., Ongsiek, T., & Goseberg, N. (2018). Drag coefficients of vertically-mounted full-scale blue mussel dropper lines. In Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018 (Vol. 7A: Ocean Engineering). American Society of Mechanical Engineers(ASME).
Hildebrandt A, Landmann J, Ongsiek T, Goseberg N. Drag coefficients of vertically-mounted full-scale blue mussel dropper lines. In Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018. Vol. 7A: Ocean Engineering. American Society of Mechanical Engineers(ASME). 2018
Hildebrandt, Arndt ; Landmann, Jannis ; Ongsiek, Thorsten et al. / Drag coefficients of vertically-mounted full-scale blue mussel dropper lines. Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018. Vol. 7A: Ocean Engineering American Society of Mechanical Engineers(ASME), 2018.
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title = "Drag coefficients of vertically-mounted full-scale blue mussel dropper lines",
abstract = "Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project {"}CAWX1607{"} is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank {"}Schneiderberg{"} (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.",
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AU - Hildebrandt, Arndt

AU - Landmann, Jannis

AU - Ongsiek, Thorsten

AU - Goseberg, Nils

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. Furthermore, the authors gratefully acknowledge the support of Prof. Dr. Bela H. Buck for providing us with insight into bivalves, from Dr.-Ing. Jens-André Paffenholz of the Geodetic Institute Hannover during 3D-scanning, from Dr. Tim Staufenberger for providing us with the mussel specimens and from Kevin Heathman on behalf of the Cawthron Institute for support regarding bivalve characteristics.

PY - 2018

Y1 - 2018

N2 - Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.

AB - Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.

KW - Aquaculture

KW - Drag coefficient

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KW - Morison equation

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VL - 7A: Ocean Engineering

BT - Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018

PB - American Society of Mechanical Engineers(ASME)

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