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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 407Constructal Design Applied to Geometric Shapes...

Constructal Design Applied to Geometric Shapes Analysis of Wave Energy Converters

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Abstract:

This paper deals with numerical simulation and the geometrical analysis of an ocean Wave Energy Converter (WEC), which has as the operating principle the Oscillating Water Column (OWC). The goal was to evaluate the geometric shape influence of the OWC chamber in the hydropneumatic power available. Therefore, four geometric shapes were analyzed: i) Rectangle (RT), ii) Trapezium (TP), iii) Inverted Trapezium (TI) and iv) Double Trapezium (DT). For this, the OWC device was subject to a JONSWAP wave spectrum with peak period (T_S) equal to 7.5 s and peak wave height (H_S) equal to 1.5 m. To do so, Constructal Design was employed varying the Degree Of Freedom (DOF) H₁/L (ratio between the height and length of the OWC chamber entrance). The problem constraints were the entrance area and the total area of the OWC chamber that were kept constant. For the numerical solution a Computational Fluid Dynamics (CFD) code, based on the Finite Volume Method (FVM),de0 was used. The multiphase Volume of Fluid (VOF) model was applied to tackle with the water-air interaction. The results indicated that when the Rectangle (RT) geometrical shape was employed an improvement of nearly 99% was achieved.

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Periodical:

Defect and Diffusion Forum (Volume 407)

Pages:

147-160

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.407.147

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Online since:

March 2021

Authors:

Mateus das Neves Gomes*, Heloiza Salvador, Felipe Magno, Amanda A. Rodrigues, Elizaldo Domingues dos Santos, Liércio André Isoldi, Luiz Alberto Oliveira Rocha

Keywords:

Computational Modeling, JONSWAP, Oscillating Water Column, Wave Energy Converter, Wave Spectrum

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