The climate crisis represents one of the greatest contemporary global challenges, requiring actions to mitigate its impacts and sustainable solutions meet growing demands for clean energy coastal protection. Therefore, study devices such as submerged plate (SP), which simultaneously acts a breakwater (BW) wave converter (WEC), is especially relevant. In this context, present numerical compares efficiency an SP device under regular waves across different geometric configurations considering...

Among the various potential renewable energy sources, sea waves offer significant potential, which can be harnessed using wave converter (WEC) devices such as overtopping converters. These operate by directing incident up a ramp into reservoir. The water then passes through turbine coupled with an electrical generator before returning to ocean. Thus, present study deals geometrical evaluation of WEC, where influence ratio between height and length device (H1/L1) on amount mass (M) that...

The conversion of wave energy in electrical one has been increasingly studied. One example converter (WEC) is the overtopping device. Its main operational principle consists a ramp which guides incoming waves into reservoir raised slightly above sea level. accumulated water flows through low head turbine generating electricity. In this sense, it performed numerical study concerned with geometric optimization an WEC for various relative depths: d /λ = 0.3, 0.5 and 0.62, by means Constructal...

Studies regarding renewable energy sources have gained attention over recent years. One example is wave converters, which harvest from sea waves using different operational principles such as oscillating water columns, bodies, and overtopping devices. In the present paper, a numerical study carried out, geometrical investigation of full-scale device with coupled structure mounted on seabed performed Constructal Design method. The main purpose to investigate influence design available power...

Given the increasing global energy demand, present study aimed to analyze influence of bathymetry on generation and propagation realistic irregular waves geometrically optimize a wave converter (WEC) device oscillating water column (OWC) type. In essence, OWC WEC can be defined as partially submerged structure that is open sea below free surface (hydropneumatic chamber) connected duct atmosphere (in which turbine installed); its operational principle based compression decompression air...

This study numerically analyzes a submerged horizontal plate (SHP) device subjected to both regular and irregular waves. can be used either as breakwater or wave energy converter (WEC). The WaveMIMO methodology was applied for the numerical generation propagation of sea state Rio Grande coast in southern Brazil. finite volume method employed solve conservation equations mass, momentum, fraction transport. fluid model handle water-air mixture. SHP length (Lp) effects were carried out five...

This paper presents a methodology that allows the numerical simulation of realistic sea waves, called WaveMIMO methodology, which is based on imposition transient discrete data as prescribed velocity finite volume computational model developed in Fluent software. These are obtained by using spectral wave TOMAWAC, where spectrum converted into series free surface elevations treated and processed propagation velocities horizontal (x) vertical (z) directions. The imposed boundary conditions...

The present study aims to evaluate the difference in fluid-dynamic behavior of an overtopping wave energy converter under incidence irregular waves based on a realistic sea state when compared regular waves, representative this state. Thus, data three regions from Rio Grande do Sul coast, Brazil, were considered. Fluent software was employed for computational modeling, which is finite volume method (FVM). numerical generation occurred through imposition velocity boundary conditions using...

This work presents a two-dimensional numerical analysis of wave channel and oscillating water column (OWC) device. The main goal is to validate methodology which uses transient velocity data as means impose boundary condition for the generation waves. To achieve this, was simulated using regular waves with same parameters those used in laboratory experiment. First, these were imposed prescribed compared analytical solution; then, OWC device inserted into computational domain, aiming this...

This research conducts a numerical study of wave energy converter (WEC) device with five coupled hydropneumatic chambers, operating based on the principle an oscillating water column (OWC). A turbine was not included, only considering tube without it. The computational domain defined by channel housing OWC subjected to regular incident waves. central objective assess impact chamber geometry maximizing total power in conversion. simulations consider pressure, mass flow rate, and power, latter...

This study describes the validation and verification of a two-dimensional numerical wave channel with Submerged Horizontal Plate (SHP). The SHP is fixed, submerged structure dual function: it acts as breakwater energy converter. To carry out procedures for computational modeling, experimental results obtained from literature were used. A relative error 2.14% maximum axial velocity below was in validation, while an average absolute 0.0043 m/s variation identified verification. Therefore, can...

Spectral wave modelling is widely used to simulate large-scale wind–wave processes due its low computation cost and relatively simpler formulation, in comparison phase-resolving or hydrodynamic models. However, some applications require a time-domain representation of sea waves. This article proposes methodology transform the spectrum into time series water surface elevation for that ocean The proposed method uses generated phase inverse Fourier turn elevation. consistency then verified....

In this work, we conducted a numerical analysis of an oscillating water column (OWC) wave energy converter (WEC) device. The main objective research was to conduct geometric evaluation the device by defining optimal configuration that maximized its available hydrodynamic power while employing realistic sea data. To achieve objective, WaveMIMO methodology used. This is characterized conversion data into time series free surface elevation. These were processed and transformed velocity...

In this work it is numerically studied the wave flow inside a tank and main operational physical principle of three different energy converters (WEC): oscillating water column (OWC), overtopping submerged plate. The are evaluated in laboratory real scales. For all cases conservation equations mass, momentum one equation for transport volumetric fraction solved with finite volume method (FVM). To tackle water-air mixture, multiphase model Volume Fluid (VOF) used. Several results showed...

In this research, considering the air methodology, an axisymmetric model was developed, validated, and calibrated for numerical simulation of Oscillating Water Column (OWC) converter subjected to a realistic sea state, representative Cassino beach, in south Brazil. To do so, Finite Volume Method (FVM) used, through Fluent software (Version 18.1), airflow inside hydro-pneumatic chamber turbine duct OWC. Furthermore, influence geometric parameters on available power OWC evaluated Constructal...

Aiming to contribute studies related the generation of electrical energy from renewable sources, this study carried out a geometric investigation an oscillating water column (OWC) wave converter (WEC) device. The structure device consists hydropneumatic chamber and air duct, where turbine is coupled generator. When waves hit device, inside it pressurized depressurized, causing flow through activating turbine. In sense, present used constructal design method evaluate influence ratio between...

Due to the exponential growth in energy consumption and possibility of using contained sea waves, present study analyzes influence wave channel bathymetry on propagation representative regular realistic irregular waves that describe state occurring coast Tramandaí city, Rio Grande do Sul, Brazil. The numerical simulations carried out this used Computational Fluid Dynamics software ANSYS Fluent, based Finite Volume Method. treatment water-air interface was performed with multiphase model. To...

This research aims a numerical and geometrical investigation about an Overtopping Device Wave Energy Converter (OTD-WEC). Constructal Design method was employed to perform geometric evaluation of this OTD-WEC submitted ocean waves with similar characteristics the coastal region Paraná State – Pontal do city in southern Brazil, located 41 km from coast 30 m water deep. It analyzed two different significant wave heights, HS1 = 1.25 HS2 1.50 m. In each set, it were simulated 10 cases ramp...

This research aims a numerical and geometrical investigation about an Overtopping Device Wave Energy Converter (OTD-WEC). Constructal Design method was employed to perform geometric evaluation of this OTD-WEC submitted ocean waves with similar characteristics the coastal region Paraná State – Pontal do city in southern Brazil, located 41 km from coast 30 m water deep. It analyzed two different significant wave heights, HS1 = 1.25 HS2 1.50 m. In each set, it were simulated 10 cases ramp...

Dentre as diversas fontes renováveis de energia que podem ser exploradas, têm-se a contida nas ondas do mar. A metodologia WaveMIMO é utilizada para geração numérica irregulares baseadas em estados mar realísticos e consiste tratar dados espectrais obtenção perfis velocidade orbital propagação das ondas, são impostos como condição contorno (CC) um canal numérico. Nesse sentido, o presente estudo avalia parâmetros aplicação desta metodologia, onde se investigou discretização da região...