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Tom van Terwisga

Team leader Resistance and Propulsion

Research & Development

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Expertise areas
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 URN and 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
Modelling of the Plume of a Submerged Exhaust System

Oct 3, 2017

The Royal Netherlands Navy (RNN) currently operates four diesel-electric Walrus class submarines. The submarines sail submerged on electric engines ...
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 simulations of the cavitating flow around a two-dimensional NACA0015 foil. The ...
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
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
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
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
On the Capability of a RANS Method to Assess the Cavitation Erosion Risk on a Hydrofoil

Aug 13, 2012

This paper aims at an assessment of the cavitation erosion risk by using a contemporary unsteady RANS method in conjunction with post-processing ...
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
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 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
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
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
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 ...
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 ...
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 ...

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