Modelling of wave loads and hydraulic performance of vertical permeable structures

Requejo, Soledad; Vidal, C. R.; Losada, Íñigo J.

doi:10.1016/s0378-3839(02)00072-8

Cited by 37 publications

(15 citation statements)

References 14 publications

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“…The performance of the numerical model was initially evaluated with data from the laboratory experiments of Requejo et al (2002), who investigated the interaction of periodic waves with a crib-style rectangular breakwater. The experiments were conducted in a 12-m long and 0.56-m wide wave flume using two structure widths (B = 0.56m, 1.12m), two characteristic stone sizes (d = 0.0105m, 0.0378m), three wave periods (T = 1.2s, 1.7s, 2.7s), and five wave heights (H = 0.02m to 0.09m).…”

Section: Wave Interaction With a Vertical Surface-piercing Breakwatermentioning

confidence: 99%

“…This approach does not make any assumption as to the profile of the flow field inside the porous medium. The numerical model is initially calibrated with data from laboratory experiments on wave interaction with a vertical porous breakwater (Requejo et al 2002). The numerical model is then used to investigate wave transmission over submerged breakwaters and compared with the laboratory data of Seabrook and Hall (1998).…”

Section: Sponsor/monitor's Report Number(s)mentioning

confidence: 99%

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Nonlinear Wave Interaction With Submerged and Surface-Piercing Porous Structures

Nwogu

Demirbilek

2007

Coastal Engineering 2006

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A coupled Boussinesq-boundary integral method is developed to simulate nonlinear water wave interaction with structures consisting of multiple layers with different physical and hydraulic characteristics. The flow field in the water region is modeled with a modified set of Boussinesq-type equations, with additional terms to account for the flow of water into/out of the porous region. The equations of motion for the porous regions include an empirical Forchheimer-type term for laminar and turbulent frictional losses, and an inertial term for acceleration effects. A boundary integral formulation based on Green's third identity is used to close the problem for the porous region. The coupled equations for the evolution of the free surface and boundary values of the tangential velocities are integrated in time using an iterative Crank-Nicolson scheme. At each time step, the Boussinesq problem is solved for the water region to determine the pressure at porous interface. The boundary integral problem for the porous region is then solved to determine the normal velocities along porous interface. The model is used to investigate wave interaction with a vertical surface-piercing porous structure and wave transmission over submerged breakwaters. Comparisons between the numerical model predictions and laboratory data show generally good agreement for both the wave field inside the structure and the reflection/transmission coefficients.

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Section: Wave Interaction With a Vertical Surface-piercing Breakwatermentioning

confidence: 99%

Section: Sponsor/monitor's Report Number(s)mentioning

confidence: 99%

Nonlinear Wave Interaction With Submerged and Surface-Piercing Porous Structures

Nwogu

Demirbilek

2007

Coastal Engineering 2006

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“…Of course the relevant parameters have to be carefully calibrated with an ad hoc procedure on the basis of available experimental data. Such an approach was first reported in Hsu et al (2002), later implemented in the COBRAS numerical code (i. e. Garcia et al 2004, Gotoh et al 2004, Greben et al 2008, Karim and Tingsanchali 2006, Lara et al 2006, Losada et al 2008, Requejo et al 2002.…”

Section: Introductionmentioning

confidence: 99%

Rubble Mound Breakwater Overtopping: Estimation of the Reliability of a 3d Numerical Simulation

Cavallaro

Dentale²,

Donnarumma³

et al. 2012

Int. Conf. Coastal. Eng.

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Until recently, physical models were the only way to investigate into the details of breakwaters behavior under wave attack. From the numerical point of view, the complexity of the fluid dynamic processes involved has so far hindered the direct application of Navier-Stokes equations within the armour blocks, due to the complex geometry and the presence of strongly non stationary flows, free boundaries and turbulence. In the present work the most recent CFD technology is used to provide a new and more reliable approach to the design analysis of breakwaters, especially in connection with run-up and overtopping. The solid structure is simulated within the numerical domain by overlapping individual virtual elements to form the empty spaces delimited by the blocks. Thus, by defining a fine computational grid, an adequate number of nodes is located within the interstices and a complete solution of the full hydrodynamic equations is carried out. In the work presented here the numerical simulations are carried out by integrating the three-dimensional Reynolds Average Navier-Stokes Equations coupled with the RNG turbulence model and a Volume of Fluid Method used to handle the dynamics of the free surface. The aim of the present work is to investigate the reliability of this approach as a design tool. Two different breakwaters are considered, both located in Southern Sicily: one a typical quarry stone breakwater, another a more complex design incorporating a spill basin and an armoured layer made up by Coreloc® blocks.

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“…Ejemplo de comparación de la evaluación de Hrms medida con la obtenida con modelo potencial (Requejo et al 2002) Rebase en dique verticales perforados En cuanto a la medición de tasas de rebase, en 2.3.1 (ec. 2.77, Tabla 2.3).…”

Section: Determinación Del Ascenso-descenso Sobre Diques Verticales Punclassified

“…Ya desde comienzos de la década de 2000, se disponen de trabajos altamente precisos de la evaluación de la altura cuadrática media en las proximidades y en el interior de este tipo de diques porosos con cámara amortiguadora (Requejo et al 2002), con variaciones drásticas de Hrms en el interior de la cámara con pequeñas variaciones del periodo de la onda incidente y, por tanto, de B/L.…”

Section: Determinación Del Ascenso-descenso Sobre Diques Verticales Punclassified

Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometría cilíndrica

Romero¹

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Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometrías cilíndricas i A Elena, Jorge y MartinaAnálisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometrías cilíndricas ii Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometrías cilíndricas iii AgradecimientosLa redacción de esta Tesis ha sido un trabajo prolongado. Remontarse al origen significa recordar a personas que aportaron su ayuda, cada uno a su manera, y que en cierta medida son sus co-autores. Sirva la limitación que impone el papel para excusar mis olvidos momentáneos, pues la cabeza puede fallar aunque no lo haga el corazón.A Elena, por su paciencia y cariño. Por su capacidad de sacrificio, que nunca deja de sorprenderme. Y por su apoyo en todos los momentos del camino, pero sobre todo cuando se hacía cuesta arriba.A Jorge y Martina, por resolver desde lo más pequeño, aun sin ellos saberlo, las preguntas que a todos nos trascienden.A mis padres, con los que he descubierto el misterio de los diálogos que el tiempo no abarca. Y así me enseñan el camino todos los días, el mismo que me enseñaron desde el principio.A mis hermanos, a mis hermanas. Ejemplos, apoyos, referencias siempre visibles.A Félix y Elena, por su sacrificio silencioso y por hacerme feliz desde la sencillez.A Vicente y Jose, por entender la función docente desde un prisma siempre humano, siempre apasionante, siempre con las puertas abiertas.A Dragados y sus personas, molde de múltiples caras, escuela de vida.A José Luis, August, Mónica, Pau, Enrique, José Luis Galmés, y toda la gente del INHA. Por sus valiosas aportaciones a lo largo del proceso.A Emilio Alonso (d.e.p.), torrente de ideas, entre ellas, la que nos atañe.Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometrías cilíndricas iv Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometrías cilíndricas v ResumenLa presente Tesis Doctoral se centra en el estudio del comportamiento hidrodinámico de una nueva tipología de dique vertical conformada mediante cajones perforados, cuyas paredes delantera y trasera están constituidas por sendas alineaciones de cilindros verticales separados entre sí.Las peculiaridades de esta tipología, objeto de la investigación, implican diferencias importantes respecto a otras configuraciones de cajones perforados existentes, mientras que otros aspectos, que afectan al comportamiento funcional, son compartidos.Se ha comprobado que el empleo de esta tipología en diques implica importantes ventajas en la reducción de cargas de oleaje en las condiciones analizadas en esta investigación, lo cual hace posible su empleo en localizaciones con terrenos de escasa capacidad portante. Igualmente, mejora las condiciones de rebase, permitiendo disminuir la cota de coronación de la estructura, hecho que puede ser relevante si se pretende ...

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Modelling of wave loads and hydraulic performance of vertical permeable structures

Cited by 37 publications

References 14 publications

Nonlinear Wave Interaction With Submerged and Surface-Piercing Porous Structures

Nonlinear Wave Interaction With Submerged and Surface-Piercing Porous Structures

Rubble Mound Breakwater Overtopping: Estimation of the Reliability of a 3d Numerical Simulation

Análisis del comportamiento hidrodinámico de un dique vertical formado por cajones con patio interior y geometría cilíndrica

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