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Casacuberta Puig, J. (author), Groot, K.J. (author), Tol, H.J. (author), Hickel, S. (author)
Selective Frequency Damping (SFD) is a popular method for the computation of globally unstable steady-state solutions in fluid dynamics. The approach has two model parameters whose selection is generally unclear. In this article, a detailed analysis of the influence of these parameters is presented, answering several open questions with...
journal article 2018
document
Groot, K.J. (author)
Laminar-turbulent transition dictates an increase in skin friction. The resulting turbulent skin friction contributes to approximately 40% of the total drag of commercial aircraft. Reducing the turbulent flow region by postponing transition can therefore significantly reduce the carbon footprint and costs of flying. Transition prediction is...
doctoral thesis 2018
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Rossi, L.C.G. (author), Groot, Ashwyn (author), Fauchez, Thomas (author), Stam, D.M. (author)
Because clouds scatter and absorb incident radiation, they play crucial roles in the radiative balance, the atmospheric chemistry, climate, and thus the habitability
of a planet. Clouds usually affect the planet’s observables. We investigate here the effect of partial and variable cloud coverage on the light that is reflected by an
Earth...
abstract 2018
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Groot, K.J. (author), Serpieri, J. (author), Pinna, Fabio (author), Kotsonis, M. (author)
A combined experimental and numerical approach to the analysis of the secondary stability of realistic swept-wing boundary layers is presented. Global linear stability theory is applied to experimentally measured base flows. These base flows are three-dimensional laminar boundary layers subject to spanwise distortion due to the presence of...
journal article 2018
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Groot, K.J. (author), Miró Miró, Fernando (author), Beyak, Ethan S. (author), Moyes, Alexander J. (author), Pinna, Fabio (author), Reed, Helen L. (author)
As the community investigates more complex flows with stronger streamwise variations and uses more physically inclusive stability techniques, such as BiGlobal theory, there is a perceived need for more accuracy in the base flows. To this end, the implication is that using these more advanced techniques, we are now including previously...
conference paper 2018
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de Bok, M.A. (author), de Jong, Gerard (author), Tavasszy, Lorant (author), Van Meijeren, Jaco (author), Davydenko, Igor (author), Benjamins, Michiel (author), Groot, Noortje (author), Miete, Onno (author), Van den Berg, Monique (author)
A large part of freight transport movements are part of a multimodal transport chain, in particular for port-related containerized transport flows. Because data of multimodal transports are unavailable it is challenging to develop a multimodal transport chain models. This paper describes the development of a new module for multimodal transport...
journal article 2018
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Casacuberta Puig, J. (author), Groot, K.J. (author), Ye, Q. (author), Hickel, S. (author)
We computed the base, instantaneous and mean flow around a micro-ramp immersed in an incompressible boundary layer. Results of our Direct
Numerical Simulations (DNS) are compared with an independent stability analysis and experiments. We analyse flow structures and mechanisms that contribute to the micro-ramp functionality and find that...
conference paper 2018
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Groot, K.J. (author), Serpieri, J. (author), Kotsonis, M. (author), Pinna, Fabio (author)
conference paper 2017
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Roobol, S. B. (author), Onderwaater, W. G. (author), van Spronsen, M. A. (author), Carla, F (author), Balmes, O (author), Navarro-Paredes, V (author), Vendelbo, S.B. (author), Kooyman, P.J. (author), Elkjær, C. F. (author), Helveg, S (author), Felici, R (author), Frenken, J. W.M. (author), Groot, I.M.N. (author)
. A Pt(110) single-crystal surface shows a wide variety of surface reconstructions and extensive faceting of the surface. Pt nanoparticles change their morphology...
journal article 2017
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Oikonomopoulou, F. (author), Bristogianni, T (author), Karron, Kaisa (author), Groot, C.J.W.P. (author), Veer, F.A. (author), Nijsse, R. (author)
In this paper a pioneering, transparent restoration methodology is presented, introducing structural glass elements to substitute missing components of damaged monuments and simultaneously reinforce the original structure. To prove the feasibility of the concept, a damaged medieval tower in Toolse, Estonia is selected as a case study: Soil...
conference paper 2016
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Groot, C.J.W.P. (author)
Factors affecting the design of repair mortars for historic masonry are: the type of masonry, the condition of the masonry and the exposure conditions. Especially in case of low-strength masonry exposed to heavy rain and high salt contents the design of a repair mortar may be a challenge. The most important problem is obtaining adequate insight...
journal article 2016
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Groot, K.J. (author), Pinna, F. (author), Van Oudheusden, B.W. (author)
The modal streamwise BiGlobal stability approach introduces problems regarding the specification of in- and outflow boundary conditions (BCs). Several conditions linked to lower hierarchical stability frameworks are elaborated and are applied to a freestream and boundary layer flow. The former case is used to demonstrate the odd-even decoupling...
journal article 2015
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Raspe, O. (author), Groot, S.t.e.f.a.n. (author), Boschman, S.E. (author), Beckers, P. (author), Sleutjens, B. (author), Boterman, W. (author), Van Gessel, G. (author)
book 2014
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Wilschut, J.A. (author), Groot, H. (author)
Schaaleffecten in de afvalinzameling is een studie naar de optimale schaal voor de gemeentelijke afvalinzameling. Uitvoering van afvalinzameling is op verschillende manieren mogelijk, zoals het laten uitvoeren door de eigen gemeentelijke dienst, samenwerken met omringende gemeenten, of uitbesteden aan een overheids- of particulier bedrijf. Dit...
working paper 2013
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van Hulst, B.L. (author), Groot, H. (author)
Synergie tussen HRM en digitale dienstverlening? is een studie naar de kostendoelmatigheid bij burgerzaken en het gecombineerde effect van HRM en digitale dienstverlening. In de studie zijn de ingezette HRM en digitale dienstverlening gerelateerd aan de kostendoelmatigheid van de afdeling Burgerzaken. Voor de inzet van zowel HRM als digitale...
working paper 2013
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Groot, N.B. (author)
One of the major challenges in optimization-based control of large-scale intelligent infrastructural networks such as traffic networks is to find efficient multilevel optimization schemes through which decisions can be made by agents or controllers of different interacting layers. The hierarchical game on which this dissertation is focused can...
doctoral thesis 2013
document
Groot, J. (author), Bloemendal, J.M. (author), Donkers, E. (author)
Grondwaterstroming is een probleem bij de open winning van bodemenergie met warmte-koudeopslag. Hierdoor kunnen warm en koud water wegstromen van de bronnen. Bij systemen met meerdere warme en koude bronnen is hier iets aan te doen. Tauw bv en Universiteit Utrecht ontwikkelden een nieuw beheermodel.
journal article 2013
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Groot, P.J.M. (author), Afrian, K. (author), Suiskind, H.S. (author), Vrolijk, M.H. (author)
De waterbouwsector staat voor grote opgaven in de komende jaren, bijvoor-beeld in het kader van het Deltaprogramma en de uitvoering van het Bestuurs-akkoord Water. Het realiseren van deze opgaven vraagt veel van de betrokken partijen in de waterbouw, waaronder de waterschappen en de marktpartijen in de waterbouw. In de afgelopen jaren zijn al...
report 2013
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Groot, J. (author), Richstein, J.C. (author), De Vries, L.J. (author)
In order to understand how companies make investment decisions under conditions of deep uncertainty, we interviewed a number of actors in the Dutch electricity sector. Most of the economic literature that is devoted to this question is prescriptive in nature, describing rational methods to the investment decision process (such as real options...
conference paper 2013
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Groot, S. (author), Harmanny, R. (author), Driessen, H. (author), Yarovoy, A. (author)
In this article, a novel motion model-based particle filter implementation is proposed to classify human motion and to estimate key state variables, such as motion type, i.e. running or walking, and the subject’s height. Micro-Doppler spectrum is used as the observable information. The system and measurement models of human movements are built...
journal article 2013
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