Modellering van een riviermeander

Bij het modelleren van rivieren leveren de bochten over het algemeen een uitdaging. Deze vormen dan ook uitstekend testmateriaal voor een model. Al jaren maakt Rijkswaterstaat in verschillende projecten gebruik van het modelleringspakket SIMONA. Dit is een eindige-volume modelpakket gebaseerd op de shallow-water-equations, bedoeld voor het...

Extreme wave impact on offshore platforms and coastal constructions

Numerical simulation of extreme wave impact on offshore platforms and coastal constructions

The simulation tool ComFLOW, developed for accurate predictions of hydrodynamic wave loading, is based on the Navier-Stokes equations. The free-surface dynamics is described through VOF, with local height-function approach to enhance accuracy. Numerical reflections are prevented by specially designed absorbing boundary conditions. Gravity...

Free-surface flow simulations for moored and floating offshore platforms

During the development of the ComFLOW simulation method many challenges have to be tackled concerning the flow modelling and the numerical solution algorithm. Examples hereof are wave propagation, absorbing boundary conditions, fluid–solid body interaction, turbulence modeling and numerical efficiency. Some of these challenges will be discussed...

A momentum conservative finite-volume scheme on a staggered z-layer grid for three-dimensional non-hydrostatic flow

In the early 90’ the research institute Deltares began the development of a non-hydrostatic extension for the existing three-dimensional shallow-water simulation software Delft3D-FLOW a modeling package which was originally intended for hydrostatic shallow-water flow. The original non-hydrostatic flow model is based on a non-conservative finite...