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Zoppini, G. (author)The research presented in this thesis focuses on the receptivity to surface roughness of swept wing boundary layers dominated by crossflow instabilities (CFI), providing insights into how surface roughness can be used to passively control the developing instabilities. Discrete roughness elements (DRE) arrays and distributed randomized roughness...doctoral thesis 2023
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Toet, A.S. (author), van Kuijk, J.I. (author), Boersma, K. (author), Santema, S.C. (author)Future mobility systems will likely incorporate more multimodal journeys. These multimodal journeys integrate multiple modes of transport, and their higher future prevalence highlights the importance of paying attention to the modality transfers within journeys. To carefully facilitate these transfers, we advocate the creation of passenger...conference paper 2023
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Roukouni, A. (author), Aquilué Junyent, Inés (author), Marti Casanovas, Miquel (author), Correia, Gonçalo (author)Seamless, efficient transport intermodality is a key aspect of the transition of cities toward sustainable mobility. The new “shared mobility hub” concept is increasingly gaining attention as a potential way to make this urgently needed transition happen. The present paper aims to provide an insightful view of the promising concept of shared...journal article 2023
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De Ponti, T.M.L. (author), Smeur, E.J.J. (author), Remes, B.D.W. (author)This paper presents the design of an Incremental Nonlinear Dynamic Inversion (INDI) controller for the novel, patent pending (NL 2031701) platform Variable Skew Quad Plane (VSQP). Part of the identified challenges is the development of a model for the actuator effectiveness and lift especially as a function of skew, the newly added degree of...conference paper 2023
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de Oliveira Barbosa, J.M. (author), Faragau, Andrei B. (author), van Dalen, K.N. (author), Steenbergen, M.J.M.M. (author)Locations in railway tracks where significant variations of the track properties occur are subject to increased track deterioration. To successfully mitigate this, the mechanisms leading to the increased deterioration need to be understood. To this end, this work presents a non-linear constitutive law for a lattice model able to describe the...journal article 2022
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Hu, W. (author)The backward/forward-facing step (BFS/FFS) is one of the canonical geometries in aerospace engineering applications, the flow field over which has attracted extensive attention in the past decades. In a supersonic flow, laminar-to-turbulent transition and shock wave/boundary layer interaction (SWBLI) can occur over these configurations, which...doctoral thesis 2020
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Thota Radhakrishnan, A.K. (author), Poelma, C. (author), van Lier, J.B. (author), Clemens, F.H.L.R. (author)Transition from laminar to turbulent flow of non-Newtonian fluids is investigated using velocimetry data. These data are obtained by applying particle image velocimetry to images obtained through ultrasound imaging (echography). This yielded the observation of intermittent structures (puffs and slugs) that are formed during transition. Post...journal article 2020
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Ampe, K.V.J. (author), Paredis, Erik (author), Asveld, L. (author), Osseweijer, P. (author), Block, Thomas (author)Recently, calls have increased for a paradigm shift or transition towards resource recovery and a circular economy in the Dutch wastewater system. However, we have observed diverging interpretations on the nature of the transition. This reflects the political environment of sustainability transitions: political struggle emerges over the...journal article 2019
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Popov, I. (author)Nanosecond dielectric barrier discharge (NS-DBD) plasma actuators is relatively<br/>new means of flow control. It has several advantages compared to more conventional<br/>means of flow control, such as small size, low weight, fast response time<br/>and controllability. It has been demonstrated to be able to promote transition of<br/>boundary...doctoral thesis 2016
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Chappin, E.J.L. (author), Dijkema, G.P.J. (author)A framework for the modeling and simulation of transitions is presented. A transition, “substantial change in the state of a socio-technical system”, typically unfolds over a long timespan. We therefore suggest to use simulation to inform transition managers on the effect of their decisions. Transition models preferably meet five functional...journal article 2015
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Lashgari, I. (author), Picano, F. (author), Breugem, W.P. (author), Brandt, L. (author)We study the transition from laminar to turbulent flow in a channel seeded with finite-size neutrally buoyant particles. A fixed ratio of 10 between the channel height and the particle diameter is considered. The flow is examined in the range of Reynolds numbers 500 ? Re ? 5000 and the particle volume fractions 0.001 ? ? ? 0.3. We report a non...journal article 2015
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- Debacker Porto, J. (author), De Lille, C.S.H. (author), Eijkelenboom, A. (author), Santema, S.C. (author) conference paper 2014
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Schot, J.J.A. (author), Pennings, P.C. (author), Pourquie, M.J.B.M. (author), Van Terwisga, T.J.C. (author)In this paper modelling assumptions for the prediction of tip vortex flow and vortex cavitation with the RANS equations and homogeneous fluid approach in Open-FOAM are presented. The effects of the changes in the turbulence model are investigated and the results are compared with PIV measurements.conference paper 2014
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Rijke, J.S. (author)This book addresses pressing challenges of policy makers, planners and project managers in the water sector to successfully implement adaptation action. It draws on case studies about water sensitive urban design (WSUD) in Australia and the Room for the River flood protection programme in the Netherlands. The book explains a procedure for...doctoral thesis 2014
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Chappin, E.J.L. (author), Ligtvoet, A. (author)Sustainability policy in the early 2000s is based on and therefore influenced by scientific literature on ‘transition’. The importance of this link has inspired the authors to explore the structure of cooperating authors and citation networks in the field. In order to understand ‘transition’ literature, we compare it with an alternative term for...journal article 2013
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Eckhardt, B.E. (author)The study of the transition to turbulence in parallel shear flows without linear instability of the laminar profile has profited immensely from the application of dynamical systems ideas. Studies of the transition in plane Couette flow and pipe flow, in particular, have shown that the transition is connected with the appearance of 3-d coherent...journal article 2012
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Rijke, J.S. (author), Van Herk, S. (author), Zevenbergen, C. (author), Ashley, R. (author)In the Netherlands and many other developed countries, flood management is transitioning from sectoral engineering approaches to more integrated approaches. The 2.3 billion Euro Room for the River programme plays an important role in this transition, because it is the first large scale infrastructure programme in the Netherlands that breaks with...conference paper 2012
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Kuik, D.J. (author)In this thesis the transition to turbulence in pipe flow is investigated. At low Reynolds numbers, the flow returns to the laminar state spontaneously. At high Reynolds number a small perturbation causes the flow to suddenly become turbulent. In the intermediate regime localized turbulence is observed. This regime is investigated using...doctoral thesis 2011
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Trung, L.H. (author), Verhagen, H.J. (author), Van der Meer, J.W. (author)The Simulator was applied to test the resistance against wave overtopping of grass covered dike slopes in Viet Nam. Observation and measurement during destructive tests were performed to investigate the development process of damage induced by overtopping flow. Damages were likely to be initiated at transition of either geometry or materials, at...conference paper 2011
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- Roggema, R.E. (author), van den Dobbelsteen, A.A.J.F. (author), Biggs, C. (author), Timmermans, W. (author) conference paper 2011
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