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Offshore wind farms are undoubtedly one of the big engineering challenges of the 21st century. It combines the design, installation, operation and maintenance of some of the largest manmade structures and this has to be done within extremely tight cost constraints. The first floating offshore wind farms will soon start production shortly followed by many
The purpose of this paper is to describe the SAMSON model that was used within Area Risk Assessment methodology, developed for Transport Canada, to determine the Frequency of Spill for four pilot areas in Canadian waters. The SAMSON model used AIS information model marine traffic and included various environmental data (currents and wind), preventative measures
The iterative error can be an important part of the total numerical error of any Computational Fluid Dynamics simulation when the iterative convergence stagnates or when loose convergence criteria are used. In the quest for better iterative convergence of CFD simulations, we consider the design of iterative methods for the Reynolds-averaged Navier-Stokes equations, discretized by
The prediction of the resistance of a ship is, together with the propeller performance prediction, part of the key aspects during the design process of a ship, as it partly ensures the quality of the power-prediction. Body fitted structured grids for ship simulations can be rather challenging and time consuming to build, especially when dealing
With regard to propeller design MARIN focuses on the best possible compromise between the propulsive efficiency and cavitation nuisance, and how further improvements can be made.Currently, we are redesigning our propeller design process. For example, we used to set the diameter applying best-practice guidelines for propeller-hull clearance. Now we specify the maximum force allowed on
Join the SSSRI-MARIN Seminar in Shanghai on May 18 where experts from SSSRI, MARIN and the industry will discuss the latest developments and design strategies.The seminar will put a spotlight on several topics: smart ships, ESD design, design for service and optimisation by means of CFD and EFD. During the adjacent days (15-17 May) the
The present paper analyses a series of Computational Fluid Dynamic simulations of the cavitating flow around a two-dimensional NACA0015 foil. The foil is placed at 6° angle of attack and the cavitation number is 1.1. Two mesh designs, namely a block-structured topology and an unstructured topology, are compared; additionally, grid refinements and time step refinements
Wave orbital motions may cause variations in the inflow conditions of thrusters, resulting in variations in thrust and torque. Physical scale model tests were carried out to investigate these thruster-wave interaction effects, with an azimuthing thruster running at constant RPMs. The observed effects include a change in mean thrust and torque values, as well as
The tugmaster looks outside the window. A huge aircraft carrier sails in front of him. The pilot on board asks him to pull astern, to slow down the vessel in this narrow channel. He is excited - it is the first time they have brought this huge vessel into port. But it feels familiar. He
ReFRESCO is a community based open-source CFD code for the maritime world. It solves multi-phase (unsteady) incompressible viscous flows using the Navier-Stokes equations, complemented with turbulence models, cavitation models and volume fraction transport equations for different phases. The code is developed by MARIN together with several other non-profit organizations around the world. ReFRESCO runs on
