Searched for: subject%3A%22Numerical%255C%2Bmodeling%22
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Derks, M. (author), Berkers, F. (author), Tukker, A. (author)
Sustainability transitions are purposeful and require deliberate collective action from multiple organizations, leading to the necessity to adopt new business models and redesign value networks. In both business model and sustainability transition research, the explicit activities needed to re-shape value creation and capture systems of...
article 2022
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Vijn, A. (author), Peet, B.J. (author), Schaaphok, M. (author), Lepelaars, E. (author), Heemink, A. (author)
This paper presents a hybrid model to estimate the magnetic behaviour of a ferromagnetic structure. The mathematical-physical model has been developed using the Method of Moments combined with a hysteresis model. The mathematical model was derived by a linearisation of the hysteresis curve. The initial magnetic state of a ferromagnetic object is...
article 2022
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Jin, J. (author), Pang, M. (author), Segers, A. (author), Han, W. (author), Fang, L. (author), Li, B. (author), Feng, H. (author), Lin, H.X. (author), Liao, H. (author)
Last spring, super dust storms reappeared in East Asia after being absent for one and a half decades. The event caused enormous losses in both Mongolia and China. Accurate simulation of such super sandstorms is valuable for the quantification of health damage, aviation risks, and profound impacts on the Earth system, but also to reveal the...
article 2022
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Yang, S. (author), Khelifi, S. (author), Brammertz, G. (author), Choubrac, L. (author), Barreau, N. (author), Bolt, P. (author), Vermang, B. (author), Lauwaert, J. (author)
Numerical models are proposed that are able to describe the current-voltage (I-V) behaviour of two Cu2ZnGeSe4 (CZGSe) solar cells measured under different illuminations at 300 K. In the model, the doping density of the CZGSe layer and the mobility of carriers are determined by capacitance-voltage (C-V) profiling and AC field Hall effect...
article 2020
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Paap, B. (author), Kraaijpoel, D. (author), Wassing, B. (author), van Wees, J.D. (author)
Numerical simulations of seismic wave propagation usually rely on a simple source modelconsisting of an idealized point location and a moment tensor. In general, this is a validapproximation when the source dimensions are small relative to the distance of points at whichthe seismic wave motions are to be evaluated. Otherwise, a more realistic...
article 2020
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li Piani, T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
article 2019
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Paap, B. (author), Kraaijpoel, D. (author), Bakker, M. (author), Gharti, H.N. (author)
Gas extraction from the Groningen natural gas field, situated in the Netherlands, frequently induces earthquakes in the reservoir that cause damage to buildings, and pose a safety hazard and a nuisance to the local population. Due to the dependence of the national heating infrastructure on Groningen gas, the short-term mitigation measures are...
article 2018
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Kociok, T. (author), February, F. (author), Grossmann, P. (author), Sprung, D. (author), van Eijk, A.M.J. (author), Stein, K. (author)
The numerical LOTOS-EUROS model that provides information on the regional distribution of aerosols was implemented for a new domain, Southern Africa. The first set-up for the study areas is discussed and a comparison of model products to experimental data is presented. The model compares favorably to MODIS satellite products on a regional scale....
conference paper 2018
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li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author)
conference paper 2018
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Fu, G. (author), Xiang Lin, H. (author), Heemink, A. (author), Lu, S. (author), Segers, A. (author), van Velzen, N. (author), Lu, T. (author), Xu, S. (author)
In this study, we investigate a strategy to accelerate the data assimilation (DA) algorithm. Based on evaluations of the computational time, the analysis step of the assimilation turns out to be the most expensive part. After a study of the characteristics of the ensemble ash state, we propose a mask-state algorithm which records the sparsity...
article 2017
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Tedeschi, G. (author), van Eijk, A.M.J. (author), Piazzolla, J. (author), Kusmierczyk-Michulec, J.T. (author)
Sea-salt aerosol concentrations in the coastal zone are assessed with the numerical aerosol-transport model MACMod that applies separate aerosol source functions for open ocean and the surf zone near the sea–land transition. Numerical simulations of the aerosol concentration as a function of offshore distance from the surf zone compare...
article 2017
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Weerheijm, J. (author), Grunwald, C. (author), Slobbe, A.T. (author), von Ramin, M. (author)
The Klotz Group (KG), an international group of experts on explosion safety, investigates the debris throw hazard associated with the accidental detonation of ammunition in reinforced concrete (RC) structures. Experiments are combined with engineering models but also with results of advanced computational modeling, which is the topic of this...
conference paper 2017
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Calvert, S.C. (author), Rypkema, J. (author), Holleman, B. (author), Azulay, D. (author), de Jong, A. (author)
This study investigates different methods to visualise uncertainty in static representations of probabilistic traffic models predictions on road-networks. Although various graphical cues may be used to represent uncertainty it is not a priori clear which of them are most suited for this purpose, since their legibility, intelligibility and the...
article 2017
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Ainslie, M.A. (author), Ellis, D.D. (author)
article 2017
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Lipsey, L. (author), Pluymaekers, M. (author), Goldberg, T. (author), van Oversteeg, K. (author), Ghazaryan, L. (author), Cloetingh, S. (author), van Wees, J.D. (author)
The presence of convective fluid flow in permeable layers can create zones of anomalously high temperature which can be exploited for geothermal energy. Temperature measurements from the Luttelgeest-01 (LTG-01) well in the northern onshore region of the Netherlands indicate variations in the thermal regime that could be indicative of convection....
article 2016
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Jonson, J.E. (author), Jalkanen, J.P. (author), Johansson, L. (author), Gauss, M. (author), van der Gon, H.A.C.D. (author)
Land-based emissions of air pollutants in Europe have steadily decreased over the past two decades, and this decrease is expected to continue. Within the same time span emissions from shipping have increased in EU ports and in the Baltic Sea and the North Sea, defined as SECAs (sulfur emission control areas), although recently sulfur emissions,...
article 2015
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Verreault, J. (author)
The PELE ammunition is characterized by a low-density filling material surrounded by a high-density brittle jacket material. An analytical model describing the fragmentation of this ammunition behind a target plate is presented. This model assumes uniaxial strain in the filling and uses the RankingeHugoniot relations to calculate the material...
article 2015
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Okullo, S.J. (author), Reynès, F. (author), Hofkes, M.W. (author)
We propose a model to reconcile the theory of inter-temporal non-renewable resource depletion with well-known stylized facts concerning the exploitation of exhaustible resources such as oil. Our approach introduces geological constraints into a Hotelling type extraction-exploration model. We show that such constraints, in combination with...
article 2015
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Fillinger, L. (author), Nijhof, M.J.J. (author), de Jong, C.A.F. (author)
A decade ago, TNO developed RASP (Rapid Acoustic Signature Prediction), a numerical model for the prediction of the target strength of immersed underwater objects. The model is based on Kirchhoff diffraction theory. It is currently being improved to model refraction, angle dependent reflection and transmission (possibly through anisotropic...
conference paper 2014
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Calvert, S.C. (author), Taale, H. (author), Snelder, M. (author), Hoogendoorn, S.P. (author)
In probabilistic traffic models, consideration of stochasticity in the dynamics of traffic gives a closer representation of a traffic system in comparison to that of a deterministic approach. Monte Carlo simulation is a broadly accepted method to consider variations in traffic within modelling. In this contribution, the possibility of increasing...
article 2014
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