Searched for: contributor:"Vuik, Kees (mentor)"
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Buwalda, Floris (author)
In the past 15 years the field of general purpose computing on graphics processing units, or GPUs, has become well developed and the practice is becoming more mainstream. Computational demands of simulation software are continuously increasing. As such for many applications traditionally computed on the central processing unit the question...
master thesis 2020
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Atsma, Michael (author)
In this thesis, we look at the traditional way of calculating a ship’s Power-Speed function using the Iterative Method, and then compare this to the renewed method created by Michaël Mersie, called the Direct Method. We find that, only under very specific circumstances, the Iterative Method can be slightly better at estimating the function of...
bachelor thesis 2019
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Vree, Pim (author)
Report about how Matrix Product States can be used to analyze a sub set of problems in quantum mechanics. A exact derivation is given of the Ising Model in a Transverse field and with these solutions the TEBD algorithm using Matrix Product states is validated.
bachelor thesis 2019
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Vis, Simone (author)
During oil drilling, the position of wells is indirectly determined by measurements near the drilling bit. However, the measurements are disturbed by noise causing errors in the measurements. It is important for large oil companies like Shell to determine the position of wells with a certain degree of uncertainty. Therefore, the main objective...
bachelor thesis 2019
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Verbist, Victor (author)
A model is developed to simulate NaCl concentrations across a cation exchange membrane in the transient regime. The convectionless Nersnt-Planck equation is combined with the continuity equation to obtain a partial dierential equation in time and space. The boundary conditions at the edges of the cell for this equationare a constant bulk...
bachelor thesis 2019
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Oude Luttikhuis, Jurjen (author)
It is possible to estimate derivatives of real functions with complex methods. These complex methods can increase speed or accuracy. The functions needs to be known to determine the derivative with a complex method.
bachelor thesis 2019
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Nagtegaal, Martijn (author)
Magnetic resonance imaging (MRI) is often used to obtain qualitative images of the human brain. Different kinds of tissues can be recognised from the different levels of contrast. Multi-echo spin-echo T 2 MR measurements can be used to obtain a quantitative map of the brain where different tissues or components can be recognised based on a...
master thesis 2018
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Fantin, Davide (author)
The models for CFD-DEM coupling for fluid-particles simulations are explored. Emphasis is given to the implementation of a multisphere approach to handle non-spherical particles and to improvements of current features available in software packages. Some tests and applications are proposed.
master thesis 2018
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Knipping, Jorien (author)
Wavelets have been very popular in the field of image compression and noise reduction. Another interesting application is adaptive mesh refinement. There are many wavelets with various properties, which will have different effects on different applications. There is no consensus on which wavelet is the best option for adaptive mesh refinement....
master thesis 2018
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Tjan, Jenny (author)
We investigate the simulation of one-phase and two-phase flow through heterogeneous porous media.The derived matrix, resulting from reservoir simulation of groundwater flow problems, can result in a large and ill-conditioned system, i.e. the matrix has a high condition number, and the modelling takes large computation time. In this thesis report...
master thesis 2018
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Teitsma, Jacco (author)
In this thesis, the methods of Matrix Product States are examined. We give background in the origin of the methods and explain in detail how the method can be applied to a series of Josephson junctions. Numerical results are given for the ground state energy analysis of these series.
bachelor thesis 2018
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Van, Huy (author)
In well-bore engineering, oil-well boreholes are made using specialized drilling rigs. The position of the drill bit needs to be indirectly determined through accelero- and magnetometer measurements. To this end, the measurement data is first converted into a survey of direction vectors by applying a series of coordinate transformations. Then, a...
bachelor thesis 2018
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Godefrooij, Roos (author)
Agragrians in the Dutch Wadden sea region struggles with salinizing farmlands. Acacia Water's project Spaarwater enabled agrarians to measure salt concentrations in the ditches of their land using their mobile phone. All these measurements would ideally be used to evaluate the effects of salinization mitigation measures and to predict water...
master thesis 2018
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Peeters, Lotte (author)
In this thesis, a coupled hydrodynamic, morphodynamic and plant growth model is reviewed. The goal of this model is to simulate plant colonization and channel formation on an initially flat or ascending substrate in a tidal landscape. To be able to simulate these biophysical processes on a small enough scale (while still using the same spatial...
master thesis 2018
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Maring, Sandra (author)
Gasunie Transport Services (GTS) is the operator of the natural gas transmission network in the Netherlands. This network is an entry-exit system where entry and exit capacities can be booked by parties called shippers. Variations in usage lead to an enormous number of possible entry-exit combinations. GTS must be able to accommodate all...
master thesis 2018
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de Rooij, Tim (author)
Time-frequency analysis and digital signal processing are important tools in the field of coastal engineering. Both can be done using techniques like Fourier or wavelet analysis, however, analysts from this field experience a threshold to use wavelet analysis instead of their current methods, often Fourier-based. This is due to the lack of...
master thesis 2017
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Boitcov, Dmitrii (author)
Existing multiscale solvers use a sequence of aggressive restriction, coarse-grid correction and prolongation operators to handle low-frequency modes on the coarse grid. High-frequency errors are resolved by employing a smoother on the fine grid. Deflation preconditioning improves matrix properties, i.e., damps slowly varying errors,...
master thesis 2017
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Mersie, Michaël (author)
The aim of this research is to evaluate two different current correction methods: the "Iterative" Method, that has (partly) replaced the traditional "Mean of means"Method and is currently in use, and the "Direct"Method, amore fundamental and mathematical approach to the problem. These methods were both developed to determine the speed of a ship...
bachelor thesis 2017
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van der Wekken, Niels (author)
The CONTACT software created by Kalker and further developed by Vollebregt has recently been integrated in dynamical simulation software like RecurDyn and libraries usable in Matlab or C. When such larger packages impose small timesteps compared to the gridsize used, a wiggle-like phenomenon arises. Additionally, transient time-stepping appears...
master thesis 2017
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Rozendaal, Marco (author)
In this thesis, it is investigated how the blood flow changes in different physiological situations, using a one-dimensional model, that describes the blood flow in compliant vessels. The one-dimensional model, that describes the blood flow, is derived based on the physical laws of conservation of momentum and conservation of mass. A high...
bachelor thesis 2017
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