Searched for: subject:"methods"
(1 - 20 of 1,056)

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Caro Ortiz, S.A. (author), Hens, R. (author), Zuidema, Erik (author), Rigutto, Marcello (author), Dubbeldam, David (author), Vlugt, T.J.H. (author)
This article explores how well vapor-liquid equilibria of pure components and binary mixtures of xylenes can be predicted using different force fields in molecular simulations. The accuracy of the Wolf method and the Ewald summation is evaluated. Monte Carlo simulations in the Gibbs ensemble are performed at conditions comparable to...
journal article 2019
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Gamarino, M. (author), Dall'Osso, Aldo (author), Lathouwers, D. (author), Kloosterman, J.L. (author)
In reactor core nodal analysis, the dependence of few-group, homogenized cross sections on the local physical conditions (i.e., the thermal-hydraulic state and material composition) is commonly represented via multivariate interpolation in parameterized libraries. In this paper, we propose a novel approach to model the spectral effects of...
journal article 2019
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Kocaman, E.S. (author), Chen, B. Y. (author), Pinho, S. T. (author)
This paper presents a new polymorphic element modelling approach for multi-scale simulation, with an application to fracture in composite structures. We propose the concept of polymorphic elements; these are elements that exist as an evolving superposition of various states, each representing the relevant physics with the required level of...
journal article 2019
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Abushaban, Almotasembellah (author), Salinas Rodriguez, S.G. (author), Mangal, M.N. (author), Mondal, Subhanjan (author), Goueli, Said A. (author), Magic-Knezev, Aleksandra (author), Vrouwenvelder, J.S. (author), Schippers, Jan C. (author), Kennedy, M.D. (author)
) as the seawater matrix interferes with ATP measurement. In...
journal article 2019
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Lu, X. (author), Ridha, M. (author), Chen, B. Y. (author), Tan, V. B.C. (author), Tay, T. E. (author)
The cohesive element (CE) has been widely used to model delamination in laminated composites. The penalty stiffness, interfacial strength and fracture toughness are three CE parameters that often determine the accuracy of the numerical analysis by finite elements (FEs). The fracture toughness may be experimentally determined through standard...
journal article 2019
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Rezaei, J. (author), Papakonstantinou, Athanasios (author), Tavasszy, Lorant (author), Pesch, U. (author), Kana, A.A. (author)
This paper presents a multi-criteria decision-making approach for the selection of a sustainable product-package design, accounting for the different actors within a food supply chain. The study extends the focus of sustainable packaging design to the collective of all supply chain actors. Decision criteria are identified via a literature...
journal article 2019
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Zhao, Xuanyu (author), Bolognin, M. (author), Donfang, Lian (author), Rohe, A. (author), Vardon, P.J. (author)
This paper describes the development and application of inflow and outflow boundary conditions (BCs) for the material point method (MPM) in order to simulate fluid flow problems. This corresponds to velocity and pressure controlled BCs. Due to the coupled Lagrangian and Eulerian description of the fluid motion in MPM it is necessary to add and...
journal article 2019
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Wang, P. (author), Goverde, R.M.P. (author)
This paper proposes a novel approach for energy-efficient timetabling by adjusting the running time allocation of given timetables using train trajectory optimization. The approach first converts the arrival and departure times to time window constraints in order to relax the given timetable. Then a train trajectory optimization method is...
journal article 2019
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Wobbes, E.D. (author), Möller, M. (author), Galavi, Vahid (author), Vuik, C. (author)
Within the standard material point method (MPM), the spatial errors are partially caused by the direct mapping of material-point data to the background grid. In order to reduce these errors, we introduced a novel technique that combines the least squares method with the Taylor basis functions, called the Taylor least squares (TLS), to...
journal article 2019
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Gilvari, H. (author), de Jong, W. (author), Schott, D.L. (author)
Densification has been carried out for many years, mostly in biomass processing, animal feed production, and pharmaceutical industries. During the years, researchers and engineers attempted to improve the product quality and minimize the production costs. The most important quality parameters of solid bio-materials are the compressive...
review 2019
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Maljaars, P.J. (author), Kaminski, M.L. (author), den Besten, J.H. (author)
A special type of fluid–structure interaction (FSI) problems are problems with periodic boundary conditions like in turbomachinery. The steady state FSI response of these problems is usually calculated with similar techniques as used for transient FSI analyses. This means that, when the fluid and structure problem are not simultaneously...
journal article 2019
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Gamarino, M. (author), Dall'Osso, Aldo (author), Lathouwers, D. (author), Kloosterman, J.L. (author)
We propose a two-dimensional (2-D) modal approach for spatial rehomogenization of nodal cross sections in light water reactor analysis. This algorithm aims to synthesize the variation in the 2-D intranodal distributions of the few-group flux and directional net currents between the core environment and the infinite-lattice approximation....
journal article 2019
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Sokolova, Irina (author), Bastisya, Muhammad Gusti (author), Hajibeygi, H. (author)
We propose a multiscale finite volume method (MSFV) for simulation of coupled flow-deformation in heterogeneous porous media under elastic deformation (i.e., poroelastic model). The fine-scale fully resolved system of equations is obtained based on a conservative finite-volume method in which the displacement and pore pressure unknowns are...
journal article 2019
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Nelissen, W. E.D. (author), Ayas, C. (author), Tekõglu, C. (author)
The Kagome structure has been shown to be a highly suited micro-architecture for adaptive lattice materials, in which selected lattice members are replaced by actuators aiming to create shape morphing structures. It is the combination of in-plane isotropy, high stiffness and low energy requirement for actuation that makes the planar Kagome...
journal article 2019
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Gil, B (author), Goñi, Rufino (author), Bijlaard, F.S.K. (author), Bayo, Eduardo (author)
Torsional effects in joints need to be investigated in order to get a complete model of the joint and also to assess the real boundary conditions for the lateral torsional effects in the beams of structural frames. Phenomena such as: torsion, warping, lateral buckling, etc. are usually analysed assuming simplified boundary conditions, namely...
journal article 2019
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Nijgh, M.P. (author)
Steel-concrete composite beams are widely used in practice because of the simple construction sequence and the economic cross-section design. The application of welded headed studs in composite beams prevents the non-destructive separation of the composite beam, which leads to a very low scoring in the sustainability assessment in terms of the...
conference paper 2018
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Rieger, V.S. (author)
Emissions of road traffic crucially influence Earth’s climate. The vehicle fleet emits not only carbon dioxide (CO2), but also nitrogen oxides (NOx), volatile organic compounds (VOC) and carbon monoxide (CO) which produce ozone (O3) and destroy methane (CH4) in the troposphere. As the demand of mobility is expected to further increase in future,...
doctoral thesis 2018
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Gamarino, M. (author)
This thesis develops novel first-principle methods to correct homogenization errors in nodal cross sections and discontinuity factors. Its aim is to improve the accuracy of nodal diffusion simulations of heterogeneous core configurations. This research builds upon previous work conducted at Framatome (Paris, France). It is based on a modal...
doctoral thesis 2018
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Jesus de Moraes, R. (author)
The exploitation of subsurface resources is, inevitably, surrounded by uncertainty. Limited knowledge on the economical, operational, and geological setting are just a few instances of sources of uncertainty. From the geological point of view, the currently available technology is not able to provide the description of the fluids and rock...
doctoral thesis 2018
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Rinaldo, Stefano Guido (author), Ceresoli, Andrea (author), Lahaye, D.J.P. (author), Merlo, Marco (author), Cvetkovic, M. (author), Vitiello, Silvia (author), Fulli, Gianluca (author)
The upward trends in renewable energy penetration, cross-border flow volatility and electricity actors’ proliferation pose new challenges in the power system management. Electricity and market operators need to increase collaboration, also in terms of more frequent and detailed system analyses, so as to ensure adequate levels of quality and...
journal article 2018
Searched for: subject:"methods"
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