Modelling the Interaction between Water Waves and the Oscillating Water Column Wave Energy Device

Şentürk, Utku; Özdamar, Aydoğan

doi:10.3390/mca16030630

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…Many efforts on numerical modeling of OWC have been done so far, such as time and frequency-domain [12], 2D Reynolds-Averaged Navier-Stokes (RANS) approach [13], 3D RANS approach [14], or 3D CFD simulation using FLUENT with a Volume-of-Fluid (VOF) method [15] or OpenFOAM with a multiphase, VOF model [16]. To the best of our knowledge, LBM has never been applied to the simulation of an OWC; we propose here a fully 3D-LES approach based on LBM.…”

Section: Introductionmentioning

confidence: 99%

Virtual wave flume and Oscillating Water Column modeled by lattice Boltzmann method and comparison with experimental data

Thorimbert

Lätt

Cappietti

et al. 2016

International Journal of Marine Energy

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In this paper, a novel approach for simulating Oscillating Water Column (OWC) using lattice Boltzmann method (LBM) is presented. A direct comparison between a real wave flume and a 3D-Large Eddy Simulation (LES) numerical lattice Boltzmann (LB) wave flume is developed through the analysis of an OWC energy converter in order to validate the LBM approach for simulating OWCs. The numerical model uses a Volume-of-Fluid (VOF) approach and handles the water-air coupling into the OWC air chamber. The experimental and numerical setup are described. Comparisons for water level during free oscillation test, water level and air pressure under regular wave attacks are given and show that the LB model is accurate. We also discuss the efficiency of the simulated OWC. The 3D numerical model offers a powerful tool in order to study the 3D phenomena occurring into OWCs.

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Section: Introductionmentioning

confidence: 99%

Virtual wave flume and Oscillating Water Column modeled by lattice Boltzmann method and comparison with experimental data

Thorimbert

Lätt

Cappietti

et al. 2016

International Journal of Marine Energy

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show abstract

“…However, recent researches in wave energy conversion domain have focused on experimental analyses using numerical wave tanks (NWT) for flow characteristics prediction in OWC systems with the help of CFD methods. The NWT system is based on the VOF model to generate the incoming incident wave by either employing the Reynolds Navier Stokes model as in [5] or a velocity potential approach [6,7].…”

Section: Introductionmentioning

confidence: 99%

Wave generation in an OWC system for wave energy conversion

2020

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This paper aims to present an overview on the wavemakers used to generate waves inside a numerical wave tank taking into consideration the biphasic air-water aspect of the incident wave. Wave markers are used to simulate the flow dynamic behaviour in the Oscillating Water Column (OWC) for wave energy conversion. Three kinds of these systems have been considered in the present work. To compare these types of wave generators a case study was adopted with the assumption of a fluid flow which is unsteady, 2D, biphasic (air-water), and k-epsilon turbulent. It has been found that the piston and the flap wave maker types are suitable for OWC device simulations.

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“…The oscillating water column (OWC) wave energy converter is the third type system, which uses the air pressure. It is the most extensively studied type of converters [4][5][6][7][8][9][10][11][12][13]. The schematic representation of the system is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of the Effect of Wave Amplitude on the Efficiency of a Wave Power System

2018

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An oscillating water column wave energy system consists of a barrier (front wall), a wave turbine, an electric generator and an air chamber (air column). The parts of a system must be improved to increase efficiency of the system in general. The dimensions of the air chamber affect directly the efficiency of the system because the conversion of the wave power into the air movement is realized here, thus the wave parameters are important. One of the characteristic parameters for waves is their amplitude. In this study, the system is simulated in 2D and solved numerically to see the effect of water wave amplitude on the efficiency of energy system. In the design of this system the barrier length is constant. The numerical modelling involves computational fluid dynamics analysis and optimization of the oscillating water column. The Navier-Stokes equations and the continuity equation are numerically solved based on the finite volume method using the commercial ANSYS Fluent code. In the numerical model the flow is assumed to be inviscid, unsteady, and incompressible. The efficiency of oscillating water column system is first increased up to 67% and then decreases to 50% with the increase of the wave amplitude.

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Modelling the Interaction between Water Waves and the Oscillating Water Column Wave Energy Device

Cited by 12 publications

References 13 publications

Virtual wave flume and Oscillating Water Column modeled by lattice Boltzmann method and comparison with experimental data

Virtual wave flume and Oscillating Water Column modeled by lattice Boltzmann method and comparison with experimental data

Wave generation in an OWC system for wave energy conversion

A Numerical Study of the Effect of Wave Amplitude on the Efficiency of a Wave Power System

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