document

Pressure reconstruction from PIV measurements in the bow region of a fast ship

Jacobi, G. (author), Thill, C.H. (author), Huijsmans, R.H.M. (author)

The paper presents velocity measurements, using particle image velocimetry, as well as a reconstruction of hydrodynamic pressures for the analysis of fast ships. Stereoscopic PIV measurements with a towed underwater PIV system are conducted during towing tank tests to obtain the velocity field in the bow region of a fast ship at speeds up to...

journal article 2022

document

Leidraad Circulair Ontwerpen: Werkafspraken voor een circulaire bouw

Wamelink, J.W.F. (author), Heesbeen, C. (author), van den Berg, Marc (author), Huijsmans, Thijs (author)

Deze leidraad gaat over circulair ontwerpen, hét moment waarin circulaire ambities vorm krijgen. De keuzes die dan worden gemaakt, hebben immers een grote invloed op het resultaat. Maar dan moeten we er natuurlijk wel voor zorgen, dat de juiste keuzes worden gemaakt. En ook moeten alle betrokkenen bij het ontwerpproces dezelfde doelen en...

report 2021

document

The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas

Hoelzl, M. (author), Huijsmans, G. T.A. (author), Pamela, S. J.P. (author), Bécoulet, M. (author), Nardon, E. (author), Haverkort, J.W. (author), Hu, D. (author), Morales, J. A. (author), Verbeek, M. (author)

JOREK is a massively parallel fully implicit non-linear extended magneto-hydrodynamic (MHD) code for realistic tokamak X-point plasmas. It has become a widely used versatile simulation code for studying large-scale plasma instabilities and their control and is continuously developed in an international community with strong involvements in...

journal article 2021

document

Low-aspect ratio appendages for wind-assisted ships

van der Kolk, N.J. (author), Akkerman, I. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author)

Wind propulsion for commercial ships has been identified as a key component in the energy transition for the maritime industry. The sailing hybrid ship will operate with leeway (drift) angles to produce a lateral force known as sideforce, for steady operation under sail. In this paper, experimental results for the sailing performance of ships...

journal article 2021

document

Experiments on a Flettner rotor at critical and supercritical Reynolds numbers

Bordogna, G. (author), Muggiasca, S. (author), Giappino, S. (author), Belloli, M. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author), van 't Veer, A.P. (author)

The Flettner rotor is attracting increasing attention as a viable technology for wind-assisted ship propulsion. Nonetheless, the influence of the Reynolds number on the aerodynamic performance of rotating cylinders is still unclear and under debate. The present study deals with a series of wind-tunnel experiments on a large-scale Flettner...

journal article 2019

document

Wind-tunnel experiments on the aerodynamic interaction between two rigid sails used for wind-assisted propulsion

Bordogna, G. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author), Belloli, M. (author)

journal article 2018

document

Efficient methodology of roll load prediction on 2D bodies in nonlinear flows

Gadi, Ratnakar (author), Huijsmans, R.H.M. (author), Akkerman, I. (author), van 't Veer, A.P. (author)

conference paper 2018

document

Experimental and numerical investigation on the heel and drift induced hydrodynamic loads of a high speed craft

Bonci, M. (author), de Jong, P. (author), van Walree, F. (author), Renilson, M. (author), Keuning, L. (author), Huijsmans, R. (author)

conference paper 2017

document

Heel-seeway-yaw coupling hydrodynamic loads on a high speed vessel

Bonci, M. (author), Renilson, M. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author)

conference paper 2017

document

Hydrodynamics of wind-assisted ship propulsion validation of RANS-CFD methodology

van der Kolk, N.J. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author)

A Reynolds-Averaged Navier Stokes computational fluid dynamics (RANS-CFD) package will be one of the primary tools used during the development of a performance prediction program for Wind-Assisted commercial ships. The modelling challenge presented by large separated flow structures in the wake of the sailing ship points to a conscientious...

conference paper 2017

document

Experimental and numerical investigation on the heel and drift induced hydrodynamical loads of a high speed craft

Bonci, M. (author), de Jong, Pepijn (author), van Walree, Frans (author), Renilson, Martin (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author)

In order to provide an insight into the manoeuvring of high speed crafts, an experimental study was undertaken at the towing tank of Delft University of Technology, using a rescue vessel of the Royal Netherlands Sea Rescue Institution (KNRM).<br/>

conference paper 2017

document

Design of the ExCersion-VCI study: The effect of aerobic exercise on cerebral perfusion in patients with vascular cognitive impairment

Leeuwis, Anna E. (author), Hooghiemstra, Astrid M. (author), Amier, Raquel (author), Ferro, Doeschka A. (author), Franken, Leonie (author), Nijveldt, Robin (author), Kuijer, Joost P A (author), Bronzwaer, Anne Sophie G T (author), van Lieshout, Johannes J. (author), Rietberg, Marc B. (author), Veerbeek, Janne M. (author), Huijsmans, Rosalie J. (author), Backx, Frank J G (author), Teunissen, Charlotte E. (author), Bron, Esther E. (author), Barkhof, Frederik (author), Prins, Niels D. (author), Shahzad, Rahil (author), Niessen, W.J. (author), de Roos, Albert (author), van Osch, Matthias J P (author), van Rossum, Albert C. (author), Biessels, Geert J. (author), van der Flier, Wiesje M. (author)

There is evidence for a beneficial effect of aerobic exercise on cognition, but underlying mechanisms are unclear. In this study, we test the hypothesis that aerobic exercise increases cerebral blood flow (CBF) in patients with vascular cognitive impairment (VCI). This study is a multicenter single-blind randomized controlled trial among 80...

journal article 2017

document

An absorbing boundary condition for free surface water waves

Duz, B. (author), Borsboom, M.J.A. (author), Veldman, A.E.P. (author), Wellens, P.R. (author), Huijsmans, R.H.M. (author)

In this paper, the use of an absorbing boundary condition (ABC) is investigated for the numerical simulation of free surface water waves. An enhanced type of an ABC based on the first- and second-order Higdon boundary conditions is presented. The numerical implementation of the ABC using a staggered grid arrangement is explained in detail....

journal article 2017

document

Generating an absorbing boundary conditions for combined wave-current sumulations

Chang, Xing (author), Akkerman, I. (author), Veldman, A.E.P. (author), Huijsmans, R.H.M. (author)

conference paper 2016

document

Hydrodynamics of wind-assisted ship propulsion verification of Rans simulations

van der Kolk, N.J. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author)

conference paper 2016

document

Validation of a simple aerodynamic model capable to predict the interaction effects occuring between two generic wind propulsion systems

Bordogna, G. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author), Fossati, F.V. (author), Belloli, M. (author)

conference paper 2016

document

The application of particle image velocimetry for the analysis of high-speed-craft hydrodynamics

Jacobi, G. (author), Thill, C.H. (author), Huijsmans, R.H.M. (author)

conference paper 2016

document

An analysis method to evaluate the added resistance in short waves considering bow wave breaking

Choi, BongJun (author), Huijsmans, R.H.M. (author)

conference paper 2016

document

On the elastic beam-fluid interaction based on structural mode shapes

Hosseini, S.M. (author), Akkerman, I. (author), Veldman, A.E.P. (author), Huijsmans, R.H.M. (author)

conference paper 2016

document

Free-surface flow simulations for moored and floating offshore platforms

Veldman, AEP (author), Luppes, R (author), van der Plas, P (author), van der Heiden, HJL (author), Duz, B. (author), Seubers, H. (author), Helder, J. (author), Bunnik, T (author), Huijsmans, R.H.M. (author)

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...

conference paper 2016