Constructal design of an onshore overtopping device in real scale for a fixed depth

Authors

  • Marcelo Moraes Goulart Universidade Federal do Rio Grande, Escola de Engenharia.
  • Jaifer Corrêa Martins Universidade Federal do Rio Grande, Escola de Engenharia.
  • Mateus das Neves Gomes Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul (UFRGS).
  • Ivoni Carlos Acunha Jr Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul (IFRS), Campus Rio Grande.
  • Jeferson Avila Souza Universidade Federal do Rio Grande, Escola de Engenharia.
  • Luiz Alberto Oliveira Rocha Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul (UFRGS).
  • Liércio André Isoldi Universidade Federal do Rio Grande, Escola de Engenharia.
  • Elizaldo Domingues dos Santos Universidade Federal do Rio Grande, Escola de Engenharia.

DOI:

https://doi.org/10.14808/sci.plena.2015.081313

Keywords:

Overtopping, Constructal Design, Ocean Wave Energy

Abstract

The study about technologies and operational principles of devices to convert wave energy into electrical one (WEC) has increased significantly. Among the studied WECs it is possible to mention the overtopping device. Its main operational principle consists on a ramp which guides the incoming waves into a reservoir raised slightly above the sea level. The accumulated water in the reservoir flows through a low head turbine generating electricity. In the present work it is performed a numerical study concerned with the effect of ramp geometry over the performance of an onshore overtopping device in real scale by means of Constructal Design. The main purpose here is to evaluate the ratio between the height and length of ramp (H1/L1) which maximizes the amount of water that enters into device reservoir for one specific distance from the bottom of the tank to the bottom of device of S = 6.0 m. In the present simulations, the conservation equations of mass, momentum and one equation for the transport of volumetric fraction are solved with the finite volume method (FVM). To tackle with water-air mixture, the multiphase model Volume of Fluid (VOF) is used. Results showed that the best shapes were achieved for the lowest ratios of H1/L1 for the evaluated depth, contrarily to what was observed in previous studies of literature for a device in laboratory scale in the middle of a wave tank mimicking an offshore overtopping device.

Author Biographies

Marcelo Moraes Goulart, Universidade Federal do Rio Grande, Escola de Engenharia.

http://lattes.cnpq.br/4437444879539182

Jaifer Corrêa Martins, Universidade Federal do Rio Grande, Escola de Engenharia.

http://lattes.cnpq.br/4704994744833413

Mateus das Neves Gomes, Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul (UFRGS).

http://lattes.cnpq.br/7153399270700704

Ivoni Carlos Acunha Jr, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul (IFRS), Campus Rio Grande.

http://lattes.cnpq.br/0120359380643615

Jeferson Avila Souza, Universidade Federal do Rio Grande, Escola de Engenharia.

http://lattes.cnpq.br/5324300115339036

Luiz Alberto Oliveira Rocha, Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Sul (UFRGS).

http://lattes.cnpq.br/2535324018884724

Liércio André Isoldi, Universidade Federal do Rio Grande, Escola de Engenharia.

http://lattes.cnpq.br/3761060945802171

Elizaldo Domingues dos Santos, Universidade Federal do Rio Grande, Escola de Engenharia.

http://lattes.cnpq.br/6854950768271660

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Published

2015-08-31

How to Cite

Goulart, M. M., Martins, J. C., Gomes, M. das N., Acunha Jr, I. C., Souza, J. A., Rocha, L. A. O., … dos Santos, E. D. (2015). Constructal design of an onshore overtopping device in real scale for a fixed depth. Scientia Plena, 11(8). https://doi.org/10.14808/sci.plena.2015.081313

Issue

Vol. 11 No. 8 (2015): August/Agosto 2015

Section

VI Conferência Sul em Modelagem Computacional

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