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Nonlinear computations of heave motions for a generic wave energy converter
KTH, School of Electrical Engineering and Computer Science (EECS), Computational Science and Technology (CST).ORCID iD: 0000-0002-1695-8809
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2018 (English)In: NAV International Conference on Ship and Shipping Research, Associazione Italiana di Tecnica Navale , 2018, no 221499, p. 283-290Conference paper, Published paper (Refereed)
Abstract [en]

A bench-marking activity of numerical methods for analysis of Wave Energy Converters (WEC) was proposed under the Ocean Energy Systems (OES) International Energy Agency (IEA) Task 10 in 2015. The purpose of the benchmark is to do a code-2-code comparison of the predicted motions and power take out for a WEC. A heaving sphere was used as a first simple test case. The participants simulated heave decay and regular and irregular wave cases. The numerical methods ranged from linear methods to viscous methods solving the Navier-Stokes equations (CFD). An overview of the results from the first phase of the benchmark was reported in [1]. The present paper focus on the simulations of the sphere using one fully nonlinear time-domain BEM one transient RANS method and one transient Direct FE method with no turbulence model. The theory of the three methods as well as the modeling of the sphere are described. Heave decay and heave motions for steep regular waves were selected as test cases in order to study and compare the capability to handle nonlinear effects. Computational efficiency and applicability of the three methods are also discussed. 

Place, publisher, year, edition, pages
Associazione Italiana di Tecnica Navale , 2018. no 221499, p. 283-290
Keywords [en]
BEM, Benchmark, CFD, DNS, Heave, RANS, Sphere, Wave energy converter, WEC
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246565DOI: 10.3233/978-1-61499-870-9-283Scopus ID: 2-s2.0-85057890803OAI: oai:DiVA.org:kth-246565DiVA, id: diva2:1318370
Conference
19th International Conference on Ship and Maritime Research, NAV 2018, 20 June 2018 through 22 June 2018
Note

QC 20190527

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved

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Jansson, Johan

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  • apa
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Output format
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