Flow analysis within the well dock of an LPD

The Landing Platform Dock vessel is mainly designed to support amphibious operations in which landing operations play an important role. For operating landing craft the vessel has a well dock at the stern, designed to station several landing craft. Landing operations are restricted by the motions of the Landing Platform Dock vessel and by the...

Investigation into the resonance behaviour of the internal water column of an open-ended monopile

The offshore wind industry is increasingly constructing wind turbines farther from the coast, in deeper water, and under more extreme conditions. This requires larger (monopile) foundations and necessitates new installation methods. An important factor affecting workability is the dynamic behavior of the monopile during installation. <br/>The...

On the effect of the heave motion on the run-up flow: The case study of a 2-D rectangular structure

Wave run-up is the vertical water uprush that occurs when an incident wave impacts on a surface-piercing body. This phenomenon is particularly relevant when waves of high steepness interact with large structures as a result of significant nonlinear interactions between incident and diffracted wave fields. The extent can be further amplificated...

Internal Loads of Semi-Submersibles at an Inconvenient Draft: An investigation into the non-linear response

Once a semi-submersible is operating at an inconvenient draft (A shallow draft with limited water column above the pontoons), the passing waves over the pontoons can not keep their linear motion and energy will be transferred to higher harmonic wave frequencies. This means the hydrodynamic response will also contain energy at these higher...

Systematic Study of Green water and its Impact on Structures

<br/>The Offshore Industry is one of the most challenging industries. Offshore vessels must survive all weather conditions over its lifetime. In heavy storms, waves and ship motions become so large that water flows onto the deck, It is referred to as Green Water and is a serious challenge that needs to be considered in designing offshore vessels...

Experimental Fluid-Structure Interaction: On Providing Reliable Experimental Data for Validation of Fluid Structure Interaction in ComFlow

Structures at sea, which can either be floating or bottom-founded, are always affected by several types of dynamic loads from wind, waves and currents; with floating offshore structures subjected to more motion and loading from these loads. Hence, necessitating more in-depth hydrodynamic analyses. Increasing size and weight of these floating...

Reduced - complexity experiment for validating Fluid-Structure Interaction in ComFLOW

Human activities in marine environment are expanding to more remote locations, exposing offshore structures and commercial vessels to more adverse environmental conditions. On the other hand, market has a continuous demand for more cost efficient designs. Therefore, the need for more sophisticated computational tools arises. In these tools, the...

Sloshing: Topside Storage Tank Application on Floating Offshore Structures

Offshore structures with partially filled storage tanks may experience sloshing of the cargo when exposed to waves. Inventive use on the topside result in storage tanks which are built as an integrated part of the deck structure. Weight control and available space is often a critical issue for offshore projects and can be improved by this...

The effect of sloshing in partially filled spherical LNG tanks on ship motions

This report describes two methods to analyse the effect of sloshing on ship motions. The first method applies linear potential theory on both the barge and the internal tanks. For the barge the radiation, diffraction and incoming wave potentials are solved. For the internal tanks only the radiation potential is calculated, as there are obviously...

Numerical modeling of wave run-up on a dike: Simulations with the VOF-model ComFLOW

Wave fields in the close vicinity of a coastal structure can be very complex, this is especially the case during extreme storm conditions and for complex geometries. There is a growing interest for numerical simulation tools capable of predicting in detail the complex hydrodynamic loads due to waves and currents and its effect at structures. In...

Numerical modeling of nonlinear Newwaves for impact assessment on offshore structures

Offshore structures are designed to resist the impact of the extreme wave. Shell EP Projects desires a computer model that is able to simulate the impact of the design wave on gravity based offshore platforms, such as the Sakhalin PA-B platform. Comflow is a numerical model that simulates fluid flow, by solving the Navier-Stokes equations using...