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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
GEOMETRICAL EVALUATION OF A SEABED STRUCTURE COUPLED WITH AN ONSHORE OVERTOPPING WAVE ENERGY CONVERTER APPLYING CONSTRUCTAL DESIGN
Submission Author:
Elizaldo dos Santos , RS , Brazil
Co-Authors:
Andréia Barros, Danyllo Amaral, Liércio Isoldi, Luiz Alberto Oliveira Rocha, Mateus das Neves Gomes, Elizaldo dos Santos
Presenter: Elizaldo dos Santos
doi://10.26678/ABCM.ENCIT2020.CIT20-0054
Abstract
Present numerical work performs the geometrical evaluation of an overtopping wave energy conversion with a coupled structure (rectangular obstacle) mounted on the seabed of a real scale wave tank by means of Constructal Design. It is simulated the main operational principle of device. The main purpose here is to evaluate the design of the overtopping that maximizes the water accumulated into reservoir. The problem studied has been subject to three constraint areas (tank, overtopping ramp and seabed placed rectangular obstacle) and two degrees of freedom: height/length ratio of the ramp (H3/L3) (or ramp slope) and distance between the bottom of wave tank and the device (H1). Conservation equations of mass, momentum and one transport equation for volume fraction of water are solved with the finite volume method. To tackle with water-air mixture, multiphase model Volume of Fluid is used. Results indicated that the variation in the obstacle height (H1) influenced the effect of the ratio H3/L3 over the mass accumulated in the reservoir, as well as, change the optimal configuration of the ramp. The insertion of rectangular obstacle reduced in almost 9 times the mass of water accumulated in the reservoir in comparison with a case without obstacle.
Keywords
Constructal Design, Numerical simulation, Geometric Evaluation, Overtopping Device, Wave Energy Converter
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