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Highly Accurate Experimental Heave Decay Tests with a Floating Sphere: A Public Benchmark Dataset for Model Validation of Fluid–Structure Interaction

Author

Listed:
  • Morten Bech Kramer

    (Department of the Built Environment, Aalborg University (AAU), Thomas Mann Vej 23, 9220 Aalborg, Denmark
    Floating Power Plant (FPP), Park Allé 382, 2625 Vallensbæk, Denmark)

  • Jacob Andersen

    (Department of the Built Environment, Aalborg University (AAU), Thomas Mann Vej 23, 9220 Aalborg, Denmark)

  • Sarah Thomas

    (Floating Power Plant (FPP), Park Allé 382, 2625 Vallensbæk, Denmark)

  • Flemming Buus Bendixen

    (Sintex, Jyllandsvej 14, 9500 Hobro, Denmark)

  • Harry Bingham

    (Department of Mechanical Engineering, Technical University of Denmark (DTU), Nils Koppels Allé, Building 403, 2800 Kgs Lyngby, Denmark)

  • Robert Read

    (Department of Mechanical Engineering, Technical University of Denmark (DTU), Nils Koppels Allé, Building 403, 2800 Kgs Lyngby, Denmark)

  • Nikolaj Holk

    (Department of the Built Environment, Aalborg University (AAU), Thomas Mann Vej 23, 9220 Aalborg, Denmark)

  • Edward Ransley

    (School of Engineering, Computing and Mathematics, University of Plymouth (UoP), Plymouth, Devon PL4 8AA, UK)

  • Scott Brown

    (School of Engineering, Computing and Mathematics, University of Plymouth (UoP), Plymouth, Devon PL4 8AA, UK)

  • Yi-Hsiang Yu

    (National Renewable Energy Laboratory (NREL), 15013 Denver West Parkway, Golden, CO 80401, USA)

  • Thanh Toan Tran

    (National Renewable Energy Laboratory (NREL), 15013 Denver West Parkway, Golden, CO 80401, USA)

  • Josh Davidson

    (Department of Fluid Mechanics, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary)

  • Csaba Horvath

    (Department of Fluid Mechanics, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary)

  • Carl-Erik Janson

    (Department of Mechanics and Maritime Sciences, Chalmers University of Technology (CTH), 40482 Gothenburg, Sweden)

  • Kim Nielsen

    (Department of the Built Environment, Aalborg University (AAU), Thomas Mann Vej 23, 9220 Aalborg, Denmark
    Ramboll Group A/S, Hannemanns Allé 53, DK-2300 Copenhagen S, Denmark)

  • Claes Eskilsson

    (Department of the Built Environment, Aalborg University (AAU), Thomas Mann Vej 23, 9220 Aalborg, Denmark
    Research Institutes of Sweden (RISE), P.O. Box 857, SE-50115 Borås, Sweden)

Abstract

Highly accurate and precise heave decay tests on a sphere with a diameter of 300 mm were completed in a meticulously designed test setup in the wave basin in the Ocean and Coastal Engineering Laboratory at Aalborg University, Denmark. The tests were dedicated to providing a rigorous benchmark dataset for numerical model validation. The sphere was ballasted to half submergence, thereby floating with the waterline at the equator when at rest in calm water. Heave decay tests were conducted, wherein the sphere was held stationary and dropped from three drop heights: a small drop height, which can be considered a linear case, a moderately nonlinear case, and a highly nonlinear case with a drop height from a position where the whole sphere was initially above the water. The precision of the heave decay time series was calculated from random and systematic standard uncertainties. At a 95% confidence level, uncertainties were found to be very low—on average only about 0.3% of the respective drop heights. Physical parameters of the test setup and associated uncertainties were quantified. A test case was formulated that closely represents the physical tests, enabling the reader to do his/her own numerical tests. The paper includes a comparison of the physical test results to the results from several independent numerical models based on linear potential flow, fully nonlinear potential flow, and the Reynolds-averaged Navier–Stokes (RANS) equations. A high correlation between physical and numerical test results is shown. The physical test results are very suitable for numerical model validation and are public as a benchmark dataset.

Suggested Citation

  • Morten Bech Kramer & Jacob Andersen & Sarah Thomas & Flemming Buus Bendixen & Harry Bingham & Robert Read & Nikolaj Holk & Edward Ransley & Scott Brown & Yi-Hsiang Yu & Thanh Toan Tran & Josh Davidson, 2021. "Highly Accurate Experimental Heave Decay Tests with a Floating Sphere: A Public Benchmark Dataset for Model Validation of Fluid–Structure Interaction," Energies, MDPI, vol. 14(2), pages 1-36, January.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:2:p:269-:d:475651
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    References listed on IDEAS

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    1. Brecht Devolder & Vasiliki Stratigaki & Peter Troch & Pieter Rauwoens, 2018. "CFD Simulations of Floating Point Absorber Wave Energy Converter Arrays Subjected to Regular Waves," Energies, MDPI, vol. 11(3), pages 1-23, March.
    2. Windt, Christian & Davidson, Josh & Ringwood, John V., 2018. "High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks," Renewable and Sustainable Energy Reviews, Elsevier, vol. 93(C), pages 610-630.
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    Cited by:

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    2. Luca Martinelli & Giulio Capovilla & Matteo Volpato & Piero Ruol & Chiara Favaretto & Eva Loukogeorgaki & Mauro Andriollo, 2023. "Experimental Investigation of a Hybrid Device Combining a Wave Energy Converter and a Floating Breakwater in a Wave Flume Equipped with a Controllable Actuator," Energies, MDPI, vol. 17(1), pages 1-18, December.
    3. Roman Gabl & Robert Klar & Thomas Davey & David M. Ingram, 2021. "Experimental Data of a Hexagonal Floating Structure under Waves," Data, MDPI, vol. 6(10), pages 1-16, September.

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