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Baars, W.J. (author), Dacome, G. (author), Lee, Myoungkyu (author)Wall-pressure fluctuations are a practically robust input for real-time control systems aimed at modifying wall-bounded turbulence. The scaling behaviour of the wall-pressure-velocity coupling requires investigation to properly design a controller with such input data so that it can actuate upon the desired turbulent structures. A...journal article 2024
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Baars, T.F. (author), Huis in ‘t Veld, Richard (author), Zhang, Linzhi (author), Koopmans, Maaike (author), McLean, Duncan (author), Martinius, A.W. (author), Abels, H.A. (author)Orbital driven climate control on sedimentation produces regional, stratigraphically repetitive characters and so cyclostratigraphic correlation can improve correlation and identify stratigraphic trends in borehole sections. This concept is commonly used to correlate marine and lacustrine strata. However, in the alluvial domain, its use is more...journal article 2023
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Carrasco Grau, J. (author), van Campenhout, O.W.G. (author), Hartog, F.H. (author), van Nesselrooij, M. (author), Baars, W.J. (author), Schrijer, F.F.J. (author)Chevron-shaped protrusions have been proposed in the literature for turbulent skin friction reduction. However, there is no consensus on the performance of this passive flow control technique; both an increase and a decrease in drag have been observed in previous studies. There is also no experimental evidence to support the working mechanism...journal article 2023
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Li, Mogeng (author), Baars, W.J. (author), Marusic, Ivan (author), Hutchins, Nicholas (author)We investigate the underlying physics behind the change in amplitude modulation coefficient in noncanonical wall-bounded flows in the framework of the inner-outer interaction model (IOIM) [Baars, Phys. Rev. Fluids 1, 054406 (2016)2469-990X10.1103/PhysRevFluids.1.054406]. The IOIM captures the amplitude modulation effect, and here we focus on...journal article 2023
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Dekker, H.N.J. (author), Baars, W.J. (author), Scarano, F. (author), Tuinstra, Marthijn (author), Ragni, D. (author)The unsteady flow behaviour of two side-by-side rotors in ground proximity is experimentally investigated. The rotors induce a velocity distribution interacting with the ground causing the radial expansion of the rotor wakes. In between the rotors, an interaction of the two wakes takes place, resulting in an upward flow similar to a fountain....journal article 2023
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Zhang, Jianguo (author), Jiang, Zaixing (author), Liang, Chao (author), Baars, T.F. (author), Wang, Y. (author), Abels, H.A. (author)The middle Eocene Dongying sag in the Bohai Bay Basin of China has an estimated shale oil resource of approximately 1.1 billion t (8.06 billion bbl); flows of shale oil have been produced in the succession from tens of wells, where the daily production of a single well generally varies between 10 and 100 t (73.3–733 bbl). Therein, the mudrock...journal article 2022
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Wang, Y. (author), Baars, T.F. (author), Sahoo, H. (author), Storms, J.E.A. (author), Martinius, A.W. (author), Gingerich, Philip (author), Abels, H.A. (author)ABSTRACT The lower Eocene Willwood Formation of the Bighorn Basin, Wyoming, USA, is an alluvial succession with a sand content varying around 25 palaeoenvironments and palaeoclimates, as well as sedimentological and stratigraphic analysis. Channel dynamics were studied at a relatively low resolution throughout the basin over the geological time...journal article 2022
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Ragni, D. (author), Fiscaletti, D. (author), Baars, W.J. (author)Abstract: This work combines the latest advancements in time marching of 3D vector fields from tomographic particle image velocimetry, with an adapted version of Lighthill’s formulation, for the prediction of far-field jet noise. Three-dimensional velocity vector fields of the jet flow are first reconstructed from a tomographic volume of 4× 3...journal article 2022
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Baars, S. (author), Schellings, G. L.M. (author), Joore, Peter (author), van Wesemael, P. J.V. (author)Research into the relationship between innovative physical learning environments (PLEs) and innovative psychosocial learning environments (PSLEs) indicates that it must be understood as a network of relationships between multiple psychosocial and physical aspects. Actors shape this network by attaching meanings to these aspects and their...journal article 2022
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Dekker, H.N.J. (author), Ragni, D. (author), Baars, W.J. (author), Scarano, F. (author), Tuinstra, Marthijn (author)An experimental investigation is conducted to study the aerodynamic behavior of a two-rotor system in ground proximity. The counter-rotating rotors are placed side-by-side in the hovering condition. The time-averaged and unsteady flow behavior is studied when the rotor-to-rotor lateral distance and the distance between the rotors and the...journal article 2022
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Li, Xuebo (author), Hutchins, Nicholas (author), Zheng, Xiaojing (author), Marusic, Ivan (author), Baars, W.J. (author)A large-scale spanwise and wall-normal array of sonic anemometers in the atmospheric surface layer is used to acquire all three components of instantaneous fluctuating velocity as well as temperature in a range of stability conditions. These data permit investigation of the three-dimensional statistical structure of turbulence structures....journal article 2022
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Minnaard, Jeffrey (author), Kleipool, Roeland P. (author), Baars, Wim (author), Dankelman, J. (author), Stufkens, Sjoerd (author), Horeman, T. (author)Aims: Resection of bone is performed in over 75% of all orthopaedic procedures and the electrically powered oscillating saw is commonly used to cut bone. Drawbacks are relatively large incisions and tissue damage due to overshooting often occur. Therefore, the goal of this study is to develop an improved bone-cutting system that has minimally...journal article 2021
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Baars, W.J. (author), Murray, Nathan E. (author), Tinney, Charles E. (author)A quantitative assessment of the acoustic source field produced by a laboratory-scale heated jet with a gas dynamic Mach number of 1.55 and an acoustic Mach number of 2.41 is performed using arrays of microphones that are traversed across the axial and radial plane of the jet's acoustic field. The nozzle contour comprises a method of...journal article 2021
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Sprecher, B. (author), Verhagen, T. (author), Sauer, Marijn Louise (author), Baars, Michel (author), Heintz, John L. (author), Fishman, Tomer (author)Re-use and recycling in the construction sector is essential to keep resource use in check. Data availability about the material contents of buildings is significant challenge for planning future re-use potentials. Compiling material intensity (MI) data is time and resource intensive. Often studies end up with only a handful of datapoints. In...journal article 2021
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Wong, L.Y.J. (author), Baars, Martine (author), He, Min (author), de Koning, Björn (author), Paas, Fred (author)Online learning environments demand learners to self-regulate their learning but many learners are poor at self-regulated learning (SRL). In this paper, two studies were conducted to examine the effect of two SRL supports, i.e., guiding goal setting and planning using an approach known as mental contrasting and implementation intentions (MCII...journal article 2021
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Kramer, O.J.I. (author), van Schaik, C. (author), Dacomba Torres, P.D.R. (author), de Moel, P.J. (author), Boek, E.S. (author), Baars, E.T. (author), Padding, J.T. (author), van der Hoek, J.P. (author)Granular activated carbon (GAC) filtration is an important unit operation in drinking water treatment. GAC filtration is widely used for its filtration and adsorption capabilities as a barrier for undesired organic macro- and micro-pollutants. GAC filtration consists of two successive phases: adsorption and filtration, capturing the impurities...journal article 2021
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Baars, Mart (author), Hellendoorn, J. (author), Alirezaei, Mohsen (author)In this research a controller is developed that can control path-tracking both within and beyond stable limit handling. The controller is based on the equations of motion of the nonlinear bicycle model. The performance of the controller is evaluated in simulation, a sensitivity analysis is performed and the controller is implemented on a 1/10...journal article 2021
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Kramer, O.J.I. (author), de Moel, P.J. (author), Padding, J.T. (author), Baars, Eric T. (author), Rutten, Sam B. (author), Elarbab, Awad H.E. (author), Hooft, Jos F.M. (author), Boek, Edo S. (author), van der Hoek, J.P. (author)Fluid flow through a bed of solid particles is an important process that occurs in full-scale water treatment operations. The Carman–Kozeny model remains highly popular for estimating the resistance across the bed. It is common practice to use particle shape factors in fixed bed state to match the predicted drag coefficient with experimentally...journal article 2021
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Kramer, O.J.I. (author), de Moel, Peter J. (author), Kaveripuram Ramasamy, S.R. (author), Baars, Eric T. (author), van Vught, Wim H. (author), Breugem, W.P. (author), Padding, J.T. (author), van der Hoek, J.P. (author)Natural particles are frequently applied in drinking water treatment processes in fixed bed reactors, fluidised bed reactors, and sedimentation processes to clarify water and to concentrate solids. When particles settle, it has been found that, in terms of hydraulics, natural particles behave differently when compared to perfectly round spheres....journal article 2021
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Berghout, Pieter (author), Baars, W.J. (author), Krug, Dominik (author)Turbulent convection systems are known to give rise to prominent large-scale circulation. At the same time, the 'background' (or 'small-scale') turbulence is also highly relevant and e.g. carries the majority of the heat transport in the bulk of the flow. Here, we investigate how the small-scale turbulence is interlinked with the large-scale...journal article 2021
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