Searched for: subject%3A%22sphere%22
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Shajahan, M.T. (author)
Dense suspension flows, both in the natural environment and industrial settings, are complex phenomena with significant implications. From rivers shaping landscapes to industrial processes involving slurry transport, these flows hold a prominent position in numerous sectors. This thesis delves into a specific facet of these intricate flows:...
doctoral thesis 2024
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Harteveld, Maurice (author)
Al decennia staren beleidsmakers en stedebouwkundigen zich blind op hoogbouwbeleid door middel van hoogteregulering. Ook al blijft dit vanuit gezondheid en welstand verstandig, dit is een eenzijdige benadering. Zeker nu er steeds meer openbare ruimtes binnen de hoogbouwprojecten ontworpen en gerealiseerd worden, rijst de vraag hoe we voorbij de...
journal article 2023
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El Hasadi, Yousef M.F. (author), Padding, J.T. (author)
At the beginning of the second half of the twentieth century, Proudman and Pearson (J. Fluid. Mech.,2(3), 1956, pp.237–262) suggested that the functional form of the drag coefficient (C<sub>D</sub>) of a single sphere subjected to uniform fluid flow consists of a series of logarithmic and power terms of the Reynolds number (Re). In this paper...
journal article 2023
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Spitzer, Stefan H. (author), Askar, Enis (author), Benke, Alexander (author), Cloney, Chris (author), D'Hyon, Sebastian (author), Dufaud, Olivier (author), Dyduch, Zdzislaw (author), Gabel, Dieter (author), Taveau, J.R. (author)
There is no applicable existing standard for the determination of safety characteristics for hybrid mixtures. While developing a new standard in a joint research project in Germany first results from parameter studies led to a standard procedure that can be adopted by laboratories that are already testing dusts in the so called 20L-sphere...
journal article 2023
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Jiang, Chuanning (author), An, Xizhong (author), Li, Meng (author), Wu, Yuhang (author), Gou, Dazhao (author), Wu, Yongli (author)
Mixing structures and characteristics are crucial to the mixing quality of spherical/cylindrical binary granular systems like the biomass-coal mixtures which can affect energy release and carbon emissions. In this work, the mixing of binary spheres/cylinders in a rotating drum was numerically reproduced by using discrete element method (DEM)....
journal article 2023
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Martinez Dominguez, Oscar Mateo (author)
<br/>The thesis proposes an education system that have the potential to safeguard freedom of education. Freedom of education is found to be essential for human flourishing after discussing Aristotle's Eudaimonia and different definitions of freedom. The thesis proposes that the social spheres (cultural, economic, and political) need to have an...
master thesis 2022
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Franschman, Lesley (author)
The way that surgeons currently use surgical navigation technology impacts their hand-eye coordination and their ability to view images and data critically. To tackle this issue Augmented Reality goggles, built from the HoloLens 2, have been developed specifically for the purpose of aiding surgeons during surgery and it is called: The HoloNav....
bachelor thesis 2022
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Kaveripuram Ramasamy, S.R. (author), Poelma, C. (author), Breugem, W.P. (author)
Path instabilities of a sphere rising or falling in a quiescent Newtonian fluid have been studied experimentally. The rich palette of possible instabilities is dependent upon two dimensionless quantities, namely the Galileo number (Ga) and the particle/fluid mass density ratio (ρ¯). In recent literature, several (Ga,ρ¯) regime maps have been...
journal article 2022
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Lovato, S. (author), Toxopeus, S.L. (author), Settels, J.W. (author), Keetels, G.H. (author)
The ship’s resistance and manoeuvrability in shallow waters can be adversely influenced by the presence of fluid mud layers on the seabed of ports and waterways. Fluid mud exhibits a complex non-Newtonian rheology that is often described using the Herschel–Bulkley model. The latter has been recently implemented in a maritime finite-volume CFD...
journal article 2022
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Zhu, L. (author)
In past decades, small spacecraft have raised worldwide interest for their low cost and short development time. In general, three reaction wheels are needed for three-axis attitude control of general satellites. However, for small spacecraft where both volume and power budgets are limited, employing three wheels is a challenge. Therefore,...
doctoral thesis 2021
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Leijenhorst, Nando (author)
In this thesis, we give a primal-dual interior point method specialized to clustered low-rank semidefinite programs. We introduce multivariate polynomial matrix programs, and we reduce these to clustered low-rank semidefinite programs. This extends the work of Simmons-Duffin [J. High Energ. Phys. 1506, no. 174 (2015)] from...
master thesis 2021
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Baggerman, Sandra (author)
The binding factor of the European Union's diverse nations is their practice of democracy. However, recently the EU has been dealing with the rising power of populism, increasing polarization and strong bubble forming; all leading to a weakening practice of local, national and union scale democracies. An important factor in this is the lacking...
master thesis 2021
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Boschan, J. (author)
Systems far from equilibrium have numerous practical uses, but challenge our understanding of their underlying physics. Materials like foams, emulsions, suspensions and granular matter can show liquidlike properties or get trapped in a solidlike jammed state. The phase transition between the flowing and static state is often referred to as the ...
doctoral thesis 2021
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Van Der Burgt, Julia S. (author), Dieleman, Christian D. (author), Johlin, Eric (author), Geuchies, J.J. (author), Houtepen, A.J. (author), Ehrler, Bruno (author), Garnett, Erik C. (author)
Accurately controlling light emission using nano- and microstructured lenses and antennas is an active field of research. Dielectrics are especially attractive lens materials due to their low optical losses over a broad bandwidth. In this work we measure highly directional light emission from patterned quantum dots (QDs) aligned underneath...
journal article 2021
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van Eerten, Sacha (author)
Raising the awareness of history and embedding the past in the present and thus the future is one of the urgent challenges of our time. Architecture can constitute a powerful bridge with the past. A building for the public is proposed, to strengthen the memory of the past while connecting with the present in Prague. Recent political turmoil once...
master thesis 2019
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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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Zhu, L. (author), Guo, J. (author), Gill, E.K.A. (author)
Induction-based reaction spheres have been presented in many references and their performances are normally investigated through experiments or numerical simulations which are time-consuming. Here, an analytical way is presented and it enables researchers to evaluate a new design quickly. In this article, the presented performance analysis is...
journal article 2019
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Lynn, Raissa (author)
Estimating a room geometry using multiple microphones rises an echoes labeling problem. Two recent methods called the graph-based and the subspace-greedy methods have shown their capability in solving this problem. The graph-based method attains a good accuracy but suffers in maintaining the computational cost when the number of microphones is...
master thesis 2018
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Abdi Negara, Parikesit (author)
Mooring system is one of the critical parts of a floating system in an offshore environment. It can be compromised by the wave drift force that exerts a considerable amount of load due to its non-linear properties. Due to the increase in complexity of the analysis, a numerical method is often opted to conduct the simulation of the wave drift...
master thesis 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
Searched for: subject%3A%22sphere%22
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