Havendammen van IJmuiden, modelonderzoek

De Bouwdienst van Rijkswaterstaat heeft WL Delft Hydraulics opdracht gegeven voor het uitvoeren van 2D fysisch modelonderzoek ten behoeve van een mogelijke renovatie van de havendammen van IJmuiden. Het betreft enerzijds modelonderzoek om meer inzicht te verkrijgen in mogelijk optredende schademechanismen bij de huidige constructie (Proevenserie...

Numerical modelling of wave interaction with dynamically stable structures

Wave interaction with dynamically stable structures is simulated by means of a numerical model based on fmite-amplitude shallow-water wave equations. The model can simulate wave motion on and inside permeable structures. For dynamically stable structures, including berm breakwaters, reef-type structures and gravel beaches, a procedure is...

Wave interaction with berm breakwaters

Wave interaction with berm breakwaters is studied by means of a physical model and a numerical model. The physical-model tests have been used to verify the wave motion as calculated by the numerical model. The numerical model based on finite-amplitude shallow-water wave equations is capable of simulating the wave motion both on and inside the...

Berm breakwater structures: Numerical simulation of breaking waves

A two-dimensional numerical model that can simulate plunging waves on permeable structures is described. The 'Volume Of Fluid' method is used to solve the incompressible Navier-Stokes equations (2DV). This enables simulations with very complex shapes of the free surface like those occurring in breaking waves. The model has been extended with...

Berm breakwater structures: Dynamically stable structures and their natural response to wave attack

Wave interaction with dynamically stable structures is studied by means of a verified numerical model. The model can simulate wave motion on and in permeable structures. For dynamically stable structures, including gravel beaches, berm breakwaters and reef-type structures, a procedure is developed to simulate the natural response to wave attack....

Berm breakwaters; hydrodynamics, forces and profile-development

The wave motion on-and-in Berm breakwaters as well as the reshaping process have been studied. Measurements were carried out to study wave interaction with a reshaped Berm breakwater. These tests were used for verification of a numerical model capable of simulating both the wave motion on as well as inside the structure. This numerical model has...

Stationary and oscillatory flow through coarse porous media

Measurements in a U-tube tunnel were carried out to study flow through coarse granular material. Tests with stationary flow and tests with oscillatory flow were done to study the differences between both. The coefficients from the extended Forchheimer equation, which is supposed to describe non-stationary porous flow, were determined. It...

Manual of Odiflocs

This manual gives information about how to use the P.C.-model ODIFLOCS. The wave action on and in several types of coastal structures can be computed. The necessary input data and the output data have been described. Although many phenomena are implemented in the model, which resulted in rather accurate predictions of several properties, further...

Numerical model for wave action on and in coastal structures

In the MAST-G6-S program numerical models will be developed for the description of wave motion on and in coastal structures. The most accurate one will probably be the SKYLLA model. That model uses the two-dimensional Navier-Stokes equations. For a description, see Broekens and Petit (1991). After it has been developed for structures with an...

Odiflocs: Computations for a berm breakwater

Computations made with the numerical model Odyflocs and compared with Skylla computations. Water pressures and water movements near the surface of a berm breakwater are computed.

Formulae to describe porous flow

For the description of porous flow the Forchheimer equation is normally used. Several formulae have been proposed for the coefficients Cl and c2 from this equation. All these formulae are based on experiments. Those coefficients represent the friction and resistance caused by the porous medium. The Forchheimer equation is a somewhat semi...