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Publications
Paper
Exciting a cavitating tip vortex with synthetic inflow turbulence: A CFD analysis of vortex kinematics, dynamics and sound generation
Jun 15, 2022
Cavitating tip vortices are one of the main contributors to underwater radiated noise (URN). To predict URNand evaluate propeller designs, it is ...
Paper
Cavitation erosion risk assessment on a full-scale steerable thruster
May 1, 2022
Propeller cavitation erosion prediction at an early design stage is becoming more and more important since it is one of the key constraints in the ...
Paper
On the use of synthetic inflow turbulence for scale-resolving simulations of wetted and cavitating flows
May 15, 2021
The Delft Twist 11 Hydrofoil is a common test case for investigating the interaction between turbulence and cavitation modelling in computational ...
Paper
Evaluation of Scale-Resolving Simulations for a Turbulent Channel Flow
Jun 20, 2020
Different variable resolution turbulence modelling approaches (Hybrid, Bridging models and LES) are evaluated for turbulent channel flow at Reτ=395, ...
Paper
Exploring the limits of RANS-VoF modelling for aircavity flows
Apr 16, 2020
BACKGROUND: Air lubrication techniques have the potential to significantly reduce frictional drag, benefiting sustainable employability of ships. ...
Magazine
Propulsion design
Jun 1, 2019
Reading time 9 minutes
In the year 2030, the French Naval Architect Monique Lorand was tasked to optimise a preliminary ship design in only 24 hours - a task deemed ...
Paper
Pans simulations: low versus high Reynolds number approach
May 13, 2019
Different approaches for specifying the ratio of modelled-to-total dissipation (fε) in the PANS model, based on the k−ω SST ...
Paper
Analysis of Hydrofoil Cavitation using Proper Orthogonal Decomposition
Oct 3, 2017
Cavitation is the change of phase from liquid to vapor when the pressure falls below the saturation pressure. For marine propellers, occurrence of ...
Paper
On the Turbulence Modelling for an Air Cavity Interface
Oct 3, 2017
The use of air lubrication techniques can significantly reduce a ship’s fuel consumption. One of the most promising techniques applicable to ships ...
Paper
Hydrodynamic working principles of Energy Saving Devices in ship propulsion systems
Jun 22, 2017
Throughout the years, many types of Energy Saving Devices (ESDs) have been introduced to the naval industry, each claiming to achieve several ...
Paper
Numerical Study Of Cavitation On A NACA0015 Hydrofoil: Solution Verification
May 15, 2017
The present paper analyses a series of Computational Fluid Dynamic simulationsof the cavitating flow around a two-dimensional NACA0015 foil.
Paper
Influence of grid setup on the prediction of hydrofoil cavitation
Oct 3, 2016
The objective of this work is to evaluate the effect of two different grid types when they are used to simulate cavitating flow using an unsteady ...
Paper
Finite Mass Transfer Effects in Cavitation Modelling
Oct 3, 2016
One of the key aspects classifying the various approaches in numerical simulation of cavitating flows is the equilibrium flow assumption. It states ...
Paper
On the Physical Mechanisms for the Numerical Modelling of Flows around Air Lubricated Ships
Sep 18, 2016
Air lubrication techniques are very promising in reducing ship drag. It has been demonstrated that air cavity applications can realise propulsive ...
Paper
Computational Study On Power Reduction By A Pre-Duct For A Bulk Carrier
Dec 2, 2015
This paper presents computational results of the flow around the Japanese Bulk Carrier (JBC). The overall agreement with the experiments for all ...
Paper
Numerical Study on Air Cavity Flows
Sep 28, 2015
This work is focused on the numerical study of two problems: the drag reduction prediction by air cavities with known size and the free-surface ...
Paper
On the working principles of Energy Saving Devices
May 5, 2013
The aim of this paper is to explain the principal mechanisms for the reduction in power demand by so called “Energy Saving Devices” (ESDs). This ...
Paper
Numerical Study on Collapse of a Cavitating Cloud of Bubbles
Aug 13, 2012
One of the major causes of wear on ship hydrofoils is cavitation. Clouds of interacting bubbles behave nonlinearly and can experience very sudden ...
Paper
Experimental Study on Developed Air Cavities Under a Horizontal Flat Plate
Aug 13, 2012
Developed air cavities can be used on the bottom of a ship for frictional drag reduction. An experimental study on the air cavity was carried out in ...
Paper
High-speed micro-scale observations of nuclei-induced sheet cavitation
Jul 4, 2011
High-speed video observations were conducted on microscale in order to reveal detailed information on the diameter, form and trajectories of nuclei ...
Paper
On the Design and Analysis of Pre-Swirl Stators for Single and Twin Screw Ships
Jun 15, 2011
Fuel saving and emission reduction are main drivers for the current strong developments in the improvement of Marine Propulsor Technology. For this ...
Paper
On Predicting Cavitation-Induced Hull Pressure Fluctuations - Wake Scale Effects And Signal Variability
Nov 24, 2010
This paper presents research efforts currently made to incorporate the influence of wake scaling and signal variability in scale model experiments ...
Paper
Water Quality Effects on Sheet Cavitation Inception on a Ship Propeller Model
May 30, 2010
Cavitation research for the maritime industry is mainly carried out in model scale facilities such as a cavitation tunnel or a depressurized towing ...
Magazine
VIRTUE boosts the role of CFD in ship hydrodynamics
Aug 12, 2009
Reading time 6 minutes
Ship resistance and propulsion are fundamental factors in the fuel efficiency of maritime transport.
Modern computational techniques allow further ...
Magazine
Integrated design approach helps reduce fuel consumption and emissions
Aug 12, 2009
Reading time 6 minutes
Efforts to reduce emissions continue worldwide. The maritime industry too, is pressing on with initiatives to cut back emissions. Undoubtedly, ...
Paper
Propeller Cavitation Modelling by CFD - Results from the VIRTUE 2008 Rome Workshop
Jun 22, 2009
Results from the Rome 2008 Workshop on cavitating propeller modelling are presented. Seven computational models by RANS, LES and BEM are benchmarked ...
Magazine
Innovative hull design brings victory again
Aug 22, 2008
Reading time 6 minutes
Delft University Solar Boat Team wins Frisian Solar Challenge for the second time
Paper
Tradeoffs in ship propulsion control: engine overloading and cavitation inception in operational conditions
Apr 1, 2008
Off-design conditions can have a severe impact on ship propulsion system behaviour. Resistance increase for instance leads to a higher engine ...
Paper
Achievements and challenges in cavitation research on ship propellers
May 9, 2007
Cavitation occurs on nearly all ship propellers. It may lead to expensive problems if not acknowledged in an early design stage. The two most ...
Paper
Cavitation inception test on a systematic series of two-bladed propellers
Sep 1, 2006
The paper aims at propeller design techniques which suppress inception of tip vortex cavitation. Model tests provide insight in the phenomena ...
Paper
Cavitation Research On Ship Propellers: A Review Of Achievements And Challenges
Sep 1, 2006
This paper reviews cavitation research on ship propellers performed in the recent past in MARIN’s Depressurized Towing Tank and cavitation tunnels. ...
Paper
Ventilation or cavitation: An experimental study to determine dynamic loads on controllable pitch propellers
Sep 1, 2006
Reading time 4 minutes
The load variation on a propeller depends mainly on the change of the inflow velocities on the propeller. And it is essentially the non-uniform ...
Paper
Time resolved PIV and flow visualization of 3D sheet cavitation
Apr 1, 2006
Time-resolved PIV was applied to study fully developed sheet cavitation on a hydrofoil with a spanwise varying angle of attack.
Paper
ITTC report of Specialist for Validation of Waterjet Test Procedures
Jan 1, 2005
The objective of the Specialist Committee on Validation of Waterjet Test Procedures is to provide proven procedures for the determination of the ...
Paper
Effect of Operational Conditions on the Cavitation Inception Speed of Naval Propellers
Aug 1, 2004
A propeller analysis package for time domain simulations is described that permits evaluation of the effects of variable operating conditions on ...
Paper
Steerable propulsion units: hydrodynamic issues and design consequences
Aug 11, 2001
The last three decades have shown a strong development in the market for steerable propulsion units. This paper addresses several main developments ...
Magazine
Air lubricated hulls and propulsors
Apr 1, 2001
Reading time 3 minutes
The idea of reducing the frictional resistance of ships by means of air cavities in the ship's bottom is not new, but is rarely applied.
Magazine
Depressurised Towing Tank - bigger, better, quicker
Sep 1, 2000
Reading time 6 minutes
Towards the end of this year, MARIN's newly rebuilt and modernised Depressurised Towing Tank (DTT) will be back in service. Henk Valkhof and Tom van ...
Magazine
TIPVOR: US and Dutch Navies unite to battle cavitation
Sep 1, 2000
Reading time 3 minutes
Cavitation research and propulsor developments are key MARIN areas of expertise and the Depressurised Towing Tank and the Cavitation Tunnel are ...
Magazine
Silent running
Sep 1, 2000
Reading time 3 minutes
Modern navies all agree on one thing: they need propeller designs which delay cavitation inception to keep their ships as quiet as possible. Bert ...
Thesis
Waterjet-Hull Interaction
Apr 25, 1996
The main objective of this work is to develop and validate tools for the analysis of interaction effects in the powering characteristics of jet ...
Paper
Hydrodynamic support in the design of submarines
Jan 1, 1988
The paper presents an overview of hydrodynamic support that can be given in the early design process of a submarine. With the knowledge and methods ...
Other experts
Christian VeldhuisTeam Leader Ships - Simulation & Development | Senior Project Manager | Research coordinator Zero Emission Shipping
Christian VeldhuisTeam Leader Ships - Simulation & Development | Senior Project Manager | Research coordinator Zero Emission Shipping