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Non-linear CFD modelling of a submerged sphere wave energy converter

conference contribution
posted on 2023-05-23, 11:34 authored by Bharath, A, Irene PenesisIrene Penesis, Jean-Roch NaderJean-Roch Nader, Gregor MacFarlaneGregor MacFarlane
The use of wave energy converters (WECs) as a renewable source of energy is quickly becoming a reality with many prototype designs currently being tested at both model and full scale. Analytical and numerical modelling has been used extensively to predict the performance of these devices using linear, inviscid and irrotational theory as a basis. This work applies a non-linear, viscous volume of fluid RANS model to simulate the diffraction and radiation problems for a single heaving submerged spherical WEC. Two amplitudes of the incident wave and sphere oscillation are considered for three different frequencies. The amplitudes are chosen to correspond to both linear and non-linear wave forms. The results of the model are compared against those of a linear FEM based model with good agreement at small amplitudes. The hydrodynamic coefficients, considered constant under linear theory, are here found to be amplitude dependent as the oscillations become non-linear. Other non-linear effects to surface forces and fluid motions on and near the submerged sphere are also presented and discussed.

Funding

Australian Renewable Energy Agency

BioPower Systems

Carnegie Wave Energy Limited

Swinburne University of Technology

History

Publication title

Proceedings of the 3rd Asian Wave & Tidal Energy Conference

Editors

S Narasimalu

Pagination

320-329

ISBN

978-981-11-0782-5

Department/School

Australian Maritime College

Publisher

Research Publishing

Place of publication

Singapore

Event title

3rd Asian Wave and Tidal Energy Conference (AWTEC 2016)

Event Venue

Singapore

Date of Event (Start Date)

2016-10-24

Date of Event (End Date)

2016-10-28

Rights statement

Copyright unknown

Repository Status

  • Restricted

Socio-economic Objectives

Wave energy

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    University Of Tasmania

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