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Meijer, Ernst (author)With high global ambitions for sustainability and circularity and increasing energy prices, the recycling industry keeps innovating to keep up with political goals and customer demand. Reducing the energy consumption in the recycling process reduces environmental impact and reduces financial costs for the customer. A energy intensive process...master thesis 2024
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Della Corte, S. (author), Kraaij, R.C. (author)We consider the context of molecular motors modelled by a diffusion process driven by the gradient of a weakly periodic potential that depends on an internal degree of freedom. The switch of the internal state, that can freely be interpreted as a molecular switch, is modelled as a Markov jump process that depends on the location of the motor....journal article 2024
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Mak, Ho Yi Lydia (author)In the atmospheric boundary layer, when surface heat flux is small and mean wind shear is strong, horizontal convective rolls that are elongated along the wind shear are formed. This study attempts to explain the asymmetry of rolls in terms of turbulence using large-eddy simulations. A pressure gradient in the north-south y direction is applied,...student report 2023
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Werker, A. (author), Pei, R. (author), Kim, Kevin (author), Moretto, Giulia (author), Estevez Alonso, A. (author), Vermeer, C.M. (author), Arcos-Hernandez, Monica (author), Dijkstra, Jelmer (author), de Vries, Erik (author)Past studies have repeatedly demonstrated the technical feasibility to produce polyhydroxyalkanoate (PHA) using bacterial biomass of mixed microbial cultures (MMCs). Commercial quality grades of poly(3-hydroxybutyrate-co-3-hydroxyvalerate), PHBV, can be produced with control of average monomer composition. However, demonstration of PHBV...journal article 2023
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Kuipers, Jeroen (author), Schoenmakers, Gijs (author), Staňková, K. (author)We consider two-player zero-sum differential games of fixed duration, where the running payoff and the dynamics are both linear in the controls of the players. Such games have a value, which is determined by the unique viscosity solution of a Hamilton–Jacobi-type partial differential equation. Approximation schemes for computing the viscosity...journal article 2023
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Sun, Yufeng (author), Pardoen, Benoît (author), van den Eijnden, A.P. (author), Wong, Henry (author)Clay rocks are multiphase porous media having a complex structure and behaviour characterised by heterogeneity, damage and viscosity, existing on a wide range of scales. The mesoscopic scale of mineral inclusions embedded in a clay matrix has an important role in the mechanisms of deformation under mechanical loading by cracking and creeping....journal article 2023
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Chen, Bei (author), Yu, Xin (author), Dong, Fuqiang (author), Wu, Wenxiu (author), Zu, Yuanzhe (author), Ren, S. (author)High-viscosity modified asphalt (HVMA) is the most commonly applied method in drainage asphalt pavements. However, some disadvantages of hot-mix HVMA, including high energy consumption and unavoidable environmental pollution, should be improved. Therefore, warm-mix additive (WMA) was introduced. In this paper, the effects of WMA on the...journal article 2023
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Basdurak, N. Berkay (author), Burchard, Hans (author), Schuttelaars, H.M. (author)Structure and intensity of estuarine exchange flow depend significantly on the eddy viscosity A<sub>v</sub> profile which is dynamically linked to various forces (e.g., gravitational, tidal, wind-driven). The impact of winds on the exchange flow is complex due to its direct (local and remote changes in shear and density stratification) and...journal article 2023
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Li, Hongyan (author), Li, Z. (author), Qiu, Liangsheng (author), Dong, Sufen (author), Ouyang, Jian (author), Dong, Xufeng (author), Han, Baoguo (author)This study aims to understand the effects and mechanisms of length, diameter, and functional group of carbon nanotubes (CNTs) on rheological behaviors of cementitious composites. The experimental results show that the addition of CNTs decreases the flow index and increases the critical shear rate of cementitious composites. CNTs with a sub...journal article 2023
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Kraaij, R.C. (author)We extend the Barles-Perthame procedure [4] (see also [22]) of semi-relaxed limits of viscosity solutions of Hamilton-Jacobi equations of the type f−λHf=h to the context of non-compact spaces. The convergence result allows for equations on a ‘converging sequence of spaces’ as well as Hamilton-equations written in terms of two equations in...journal article 2022
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Gonzales, A. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)The pre-treatment of waste activated sludge (WAS) has become more common since it often results in improved bioconversion to methane, in both rate and extent. However, thorough insights on the possible effects and mechanisms of mild pre-treatment techniques, such as temperatures <100 °C combined with the addition of H<sub>2</sub>O<sub>2<...journal article 2022
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Marynets, K. (author)We study boundedness of solutions to a linear boundary value<br/>problem (BVP) modelling a two-layer ocean with a uniform eddy viscosity in<br/>the lower layer and variable eddy viscosity in the upper layer. We analyse<br/>bounds of solutions to the given problem on the examples of different eddy<br/>viscosity profiles in the case of their...journal article 2022
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Smith, A.L. (author)Molten salts have recently received increased attention worldwide as key materials for sustainable and low-carbon energy supply technologies (e.g. thermal energy storage, concentrated solar power technologies, fission and fusion nuclear reactors) thanks to their appealing thermo-physical properties. In particular, they are used as fuel and...review 2022
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Basu, S. (author), Holtslag, Albert A. M. (author)In this study, we utilize a novel approach to solve the Ekman equations for eddy-viscosity profiles in the stable boundary-layer. By doing so, a well-known expression for the stable boundary-layer height by Zilitinkevich (Boundary-Layer Meteorology, 1972, Vol. 3, 141–145) is rediscovered.journal article 2022
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Chen, Bei (author), Dong, Fuqiang (author), Yu, Xin (author), Ren, S. (author), Zheng, Changjiang (author)Today, high-viscosity modified asphalt (HVMA) is widely used in drainage asphalt pavements. However, due to its high construction temperature, HVMA is prone to thermal oxidative aging, which reduces its life cycle and increases the maintenance costs of asphalt pavements. In this study, the effects of warm-mix additives on the physical,...journal article 2022
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Habibi, P. (author), Rahbari, A. (author), Blazquez, Samuel (author), Vega, Carlos (author), Dey, P. (author), Vlugt, T.J.H. (author), Moultos, O. (author)The thermophysical properties of aqueous electrolyte solutions are of interest for applications such as water electrolyzers and fuel cells. Molecular dynamics (MD) and continuous fractional component Monte Carlo (CFCMC) simulations are used to calculate densities, transport properties (i.e., self-diffusivities and dynamic viscosities), and...journal article 2022
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Mastromarino, S. (author)The Molten Salt Reactor (MSR) is one of the six types of Generation IV nuclear energy systems with the main goals of sustainability, safety, reliability, economic competitiveness and proliferation resistance. This technology has spawn interest worldwide. Numerous universities, institutes and companies are carrying out research projects related...doctoral thesis 2021
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Cegielski, Gustaw (author)Model order reduction (MOR) has been a field of active research in the past twenty years, more recently also in fluid dynamics. The main advantage of MOR is computational cost reduction, which, along with equally important accuracy, constitute main objective in the MOR community.<br/>A main ongoing issue is that data volumes in fluid flow...master thesis 2021
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Chen, Y. (author)Extrusion-based 3D concrete printing (3DCP), as one of the emerging techniques, has received considerable attention from both academia and industry, due to its numerous benefits for concrete construction, through enhancing the freedom of architectural design, eliminating formwork, optimizing material use, and decreasing wastes, labors and costs....doctoral thesis 2021
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Zhao, Lixiao (author), Feng, Pan (author)Chloride diffusion in concrete is one of the key parameters of durability design for structure. Existing methods of reducing the chloride diffusion such as decreasing water-cement ratio and adding mineral admixtures often lead to increase the risk of concrete cracking. In this study, we focused on mitigating the permeation of chloride ions in...conference paper 2021