Searched for: subject:"spheres"
(1 - 20 of 26)

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Haddadi, S. (author), Ramazani, A. (author), Mahdavian, M. (author), Taheri, P. (author), Mol, J.M.C. (author), Gonzalez Garcia, Y. (author)
The ability of an active protective organic coating to restore its protection functionality in case of a coating defect is of pivotal importance to ensure durable performance under demanding corrosive conditions. In this paper, a self-healing epoxy system is fabricated by separate encapsulation of epoxy and polyamine in carbon hollow spheres ...
journal article 2019
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Terra, W. (author), Sciacchitano, A. (author), Scarano, F. (author), van Oudheusden, B.W. (author)
The accuracy of the “PIV wake rake” method to measure the drag of transiting objects is evaluated. Tomographic Particle Image Velocimetry measurements are conducted on a sphere towed at different speeds, within a Reynolds number range where the drag coefficient is constant. In contrast to PIV wake rake application on steady models in wind...
conference paper 2018
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Hart, K.P. (author), van Mill, J. (author)
The classical Erdös spaces are obtained as the subspaces of real sep- arable Hilbert space consisting of the points with all coordinates rational or all coordinates irrational, respectively. One can create variations by specifying in which set each coordinate is allowed to vary. We investigate the homogeneity of the resulting subspaces. Our...
journal article 2018
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Zhu, L. (author), Guo, J. (author), Gill, E.K.A. (author)
In recent years, the increasing need in small satellite solutions triggers the miniaturization of attitude control systems. Reaction spheres were proposed as promising replacements of conventional reaction wheels for their 4π rotations. Since the generated control torques could be about any desired axes, a single reaction sphere is sufficient...
journal article 2018
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Peters, J.A. (author), Geraldes, Carlos F.G.C. (author)
A semi-empirical equation to estimate the hydration number of Mn(II) complexes was derived from a database of 49 previously published <sup>1</sup>H longitudinal Nuclear Magnetic Relaxation Dispersion profiles. This equation has the longitudinal <sup>1</sup>H relaxivity and the molecular weight of the Mn(II) complex under consideration as...
journal article 2018
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Haddadi, S. (author), Ramazani, S. A.A. (author), Mahdavian, M. (author), Taheri, P. (author), Mol, J.M.C. (author)
In this work, we synthesized carbon hollow spheres (CHSs) using the silica templating method, encapsulated 2-mercaptobenzimidazole (MBI) inhibitor in the CHSs and evaluated their corrosion inhibition performance upon exposure of mild steel to a saline solution containing the released inhibitor. The effects of silica template surface...
journal article 2018
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Seblany, F. (author), Homberg, U. (author), Vincens, E. (author), Winkler, P. (author), Witt, K.J. (author)
Granular filters are materials used to avoid mass transport under seepage flow. They are installed in zoned dams or on the downstream slope of levees to prevent the wash out of soil particles through the core of the earth structures or through its foundation. This migration is stopped if the particles are blocked on their pathway by a...
conference paper 2017
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Teunissen, P.J.G. (author)
The DIA method for the detection, identification and adaptation of model misspecifications combines estimation with testing. The aim of the present contribution is to introduce a unifying framework for the rigorous capture of this combination. By using a canonical model formulation and a partitioning of misclosure space, we show that the...
journal article 2017
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Terra, W. (author), Sciacchitano, A. (author), Scarano, F. (author)
A method is introduced to measure the aerodynamic drag of moving objects such as ground vehicles or athletes in speed sports. Experiments are conducted as proof-of-concept that yield the aerodynamic drag of a sphere towed through a square duct in stagnant air. The drag force is evaluated using large-scale tomographic PIV and invoking the time...
journal article 2017
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Lenchenkov, N. (author)
In many oil fields, water is injected into a reservoir to displace oil to the production wells. During the injection process, oil is pushed by water towards production wells which have a lower pressure than the rest of the reservoir. If the reservoir is homogeneous, then a good sweep efficiency of the water flood process is expected. However,...
doctoral thesis 2017
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van der Walle, P (author), Kramer, E. (author), van der Donck, J.C.J. (author), Mulckhuyse, W (author), Nijsten, L. (author), Bernal Arango, F.A. (author), de Jong, A. (author), van Zeijl, E. (author), Spruit, H. E.T. (author), van den Berg, J.H. (author), Nanda, G. (author), van Langen-Suurling, A.K. (author), Alkemade, P.F.A. (author), Pereira, S.F. (author), Maas, D.J. (author)
Particle defects are important contributors to yield loss in semi-conductor manufacturing. Particles need to be detected and characterized in order to determine and eliminate their root cause. We have conceived a process flow for advanced defect classification (ADC) that distinguishes three consecutive steps; detection, review and...
conference paper 2017
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Zuccaro Marchi, Leonardo (author)
Victor Gruen is the pioneer of the regional shopping centre, he is the “Mall Maker”, which, is also the title of a book by M. Jeffrey Hartwick about this Austrian-born architect. Well known for his first commercial projects, which have been copied and analysed worldwide, mostly negatively influencing the structure of cities and societies, Gruen...
journal article 2017
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Taveau, J.R. (author), Going, J. E. (author), Hochgreb, S. (author), Lemkowitz, S.M. (author), Roekaerts, D.J.E.M. (author)
Dust explosibility is traditionally described by two parameters, namely the maximum explosion pressure, P<sub>max</sub>, and the deflagration index, K<sub>St</sub>, usually determined through testing in a closed, pressure-resistant spherical vessel, either 20 L or 1 m<sup>3</sup> in volume. These parameters constitute key variables in the...
journal article 2017
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Yin, Liang Jun (author), Ji, Wei Wei (author), Liu, Shi Yu (author), He, Wei Dong (author), Zhao, Lin (author), Xu, Xin (author), Fabre, Andrea (author), Dierre, Benjamin (author), Lee, Ming Hsien (author), van Ommen, J.R. (author), Hintzen, H.T.J.M. (author)
Synthesizing pure phase Ba<sub>3</sub>Si<sub>6</sub>O<sub>9</sub>N<sub>4</sub> by the conventional solid-state reaction method is challenging because of easily formed secondary phase Ba<sub>3</sub>Si<sub>6</sub>O<sub>12</sub>N<sub>2</sub> showing similar crystal structure. In this work, an alternative low temperature synthesis method is...
journal article 2016
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Gishkori, S.S. (author)
Wireless communications is undergoing massive development in all forms of its manifestations. In the field of short-range communications, technologies like ultra- wideband (UWB) systems are promising very high data rates, fine timing resolution and coexistence with other physical layer standards. Along with these benefits, the promise of low...
doctoral thesis 2014
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Van Heijkamp, L.F. (author)
In this study non-invasive neutron scattering techniques are used on soft condensed matter, probing colloidal length scales. Neutrons penetrate deeply into matter and have a different interaction with hydrogen and deuterium, allowing for tunable contrast using light and heavy water as solvents. The mesoscopic structure of materials is determined...
doctoral thesis 2011
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Theunissen, R. (author)
As an experimental tool, Particle Image Velocimetry has quickly superseded traditional point-wise measurements. The inherent image processing has become standardized though the performances are strongly dependent on user experience. Moreover, the arduously selected image interrogation parameters are applied uniformly throughout the image...
doctoral thesis 2010
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Herbst, O. (author), Luding, S. (author)
Using an advanced history dependent contact model for DEM simulations, including elasto-plasticity, viscosity, adhesion, and friction, pressure-sintered tablets are formed from primary particles. These tablets are subjected to unconfined uni-axial compression until and beyond failure. For fast and slow deformation we observe ductile-like and...
journal article 2008
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Bluemink, J.J. (author), Naso, A. (author), Prosperetti, A. (author)
This paper illustrates the Physalis method designed for the simulation of Navier-Stokes flows with suspended rigid spheres. The method exploits the no-slip condition to linearize the flow about a rigid body motion in the immediate vicinity of each particle. In this way an analytic solution valid within a mesh length near the particle surface...
conference paper 2006
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Gushchin, V.A. (author), Matyushin, P.V. (author)
The homogeneous (1 < Re < 5000000) and stratified (0.004 < Fr < 1, 10 < Re < 1000) viscous incompressible fluid flows around a sphere have been investigated by means of the direct numerical simulation (DNS) and the visualization of the vortex structures in the wake. In case of the homogeneous fluid at 200 < Re < 1000 the detailed formation...
conference paper 2006
Searched for: subject:"spheres"
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