Searched for: subject%3A%22numerical%255C%252Bmodel%22
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Kollaard, Freek (author)
As the environment is changing temperatures are changing, becoming more extreme. This is expected to affect the oceans and its transport, specifically the Atlantic Meridional Overturning Circulation (AMOC). The Labrador Sea is a part of the AMOC, where overturning in depth and density space occurs, due to deep convection. Deep convection is the...
master thesis 2022
document
Volker, Thijs-Gerrit (author)
Implementation of an Explicit Algebraic Reynolds Stress Model in Isogeometric Analysis for seperating flows using a two-equation k-omega model. The model is verified for simple cases such as homogeneous isotropic decaying turbulence, and the turbulent backward facing step
master thesis 2022
document
Payo-Payo, Marta (author), Bricheno, Lucy M. (author), Dijkstra, Y.M. (author), Cheng, Weicong (author), Gong, Wenping (author), Amoudry, Laurent O. (author)
Salt intrusion in surface waters endangers freshwater availability, influences water quality, and affects estuarine ecosystem services with high economic and social values. Salt transport and the resulting salinity distributions result from the non-linear interactions between salt and water dynamics. Estuaries are often considered under ...
journal article 2022
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Marsman, C.P. (author), van der Wal, W. (author), Riva, R.E.M. (author), Freymueller, J. T. (author)
In Southeast Alaska, extreme uplift rates are primarily caused by glacial isostatic adjustment (GIA), as a result of ice thickness changes from the Little Ice Age to the present combined with a low-viscosity asthenosphere. Previous GIA models adopted a 1-D Earth structure. However, the actual Earth structure is likely more complex due to the...
journal article 2021
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Rijnsburger, S. (author), Flores, Raúl P. (author), Pietrzak, J.D. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author), Zijl, Firmijn (author)
The Rhine region of freshwater influence (ROFI) is strongly stratified, rotational, relatively shallow and has large tides, resulting in a dynamic field of fronts that are formed by multiple processes. We use a 3D numerical model to obtain a conceptual picture of the frontal structure and the processes responsible for generating this multiple...
journal article 2021
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Zhou, Z. (author), Ge, Jianzhong (author), van Maren, D.S. (author), Wang, Zhengbing (author), Kuai, Y. (author), Ding, Pingxing (author)
Lateral flows redistribute sediment and influence the morphodynamics of channel-shoal systems. However, our understanding of lateral transport of suspended sediment during high and low water slack is still fairly limited, especially in engineered estuaries. Human interventions such as dike-groyne structures influence lateral exchange...
journal article 2021
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Rijnsburger, S. (author), Flores, Raúl P. (author), Pietrzak, J.D. (author), Lamb, Kevin G. (author), Jones, Nicole L. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author)
Remotely sensed images document the occurrence of multiple packets of internal solitary waves (ISWs) in the Rhine River plume at the same time. We use a combination of field observations, and non-hydrostatic and hydrostatic modeling to understand the processes that lead to the generation and retention of multiple ISW packets within the Rhine...
journal article 2021
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Broersen, Tijn (author)
The number of offshore wind farms is growing rapidly, which increases the likelihood of ship collisions with offshore wind turbines. Additionally, the cost of energy reduction for wind turbines is achieved due to radical design optimizations. Therefore, simple methods should be obtained to determine the offshore wind turbine response during ship...
master thesis 2020
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Truong, S.H. (author), Li, Un (author), Uijttewaal, W.S.J. (author)
Transverse exchange processes of mass and momentum in floodplain regions of channels are of primary importance regarding the sediment transport and riverbank stability. The presence of large horizontal coherent structures (LHCSs) at the interface of the floodplain and main channel regions may contribute up to 90% the amount of transverse...
conference paper 2020
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Sutter, V.B. (author)
In this additional thesis a 2D urban flood model in the downtown area of Shanghai was investigated. Therefore a numerical model of Delft3D flexible mesh (DFM) was used. Since the model was investigated from scratch, a lot of data analysis and pre-processing was required to have reasonable input data. As input data a surface elevation map, a map...
student report 2019
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van den Berg, Jelle Jacobus (author)
In this thesis the equilibrium cross-sectional areas of a tidal inlet are investigated. The most common used methods to study cross-sectional stability are the Escoffier method (Escoffier, 1940) and the Modified Escoffier method (Van de Kreeke, 2004). The Escoffier methods are mainly empirical and lack physical justification. Therefore, in this...
master thesis 2018
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van Langevelde, Bart (author)
A growing risk of flooding in coastal areas and the corresponding development of legislation drive continuous development in the field of hydraulic engineering. Failure due to<br/>wave overtopping is not fully understood from a physical point of view. Existing knowledge gaps, processes that are not yet explained by physics or not even discovered...
master thesis 2018
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de Vet, P.L.M. (author), van Prooijen, Bram (author), Schrijvershof, R. A. (author), van der Werf, J. J. (author), Ysebaert, T. (author), Schrijver, M. C. (author), Wang, Zhengbing (author)
Estuarine intertidal areas are shaped by combined astronomical and meteorological forces. This paper reveals the relative importance of tide, surge, wind, and waves for the flow and sediment transport on large intertidal shoals. Results of an intensive field campaign have been used to validate a numerical model of the Roggenplaat intertidal...
journal article 2018
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Hanssen, J.L.J. (author)
To date there is limited knowledge about the flow behaviour of non-Newtonian slurry and tailings flows. In hydraulic engineering and the mining industry numerous questions and uncertainties still exist. Different numerical and analytical models have been developed attempting to meet this demand. For the larger part they describe the rheological...
master thesis 2016
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De Bakker, A. T M (author), Tissier, M.F.S. (author), Ruessink, B. G. (author)
The numerical model SWASH is used to investigate nonlinear energy transfers between waves for a diverse set of beach profiles and wave conditions, with a specific focus on infragravity waves. We use bispectral analysis to study the nonlinear triad interactions, and estimate energy transfers to determine energy flows within the spectra. The...
journal article 2016
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Rodriguez Barragan, O.P. (author)
The investigation performed for this MSc graduation thesis has focused on the creation of a numerical model for the induced failure of the trial embankment in location B within the Leendert de Boerspolder. What has been modeled in this MSc graduation thesis project is a 2D cross section of the mentioned embankment. Later on its safety has been...
master thesis 2015
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Orru, C. (author), Chavarrias Borras, V. (author), Ferrara, V. (author), Stecca, G. (author), Blom, A. (author)
A flume experiment was conducted to examine the evolution of a sand-gravel reach under a lack of sediment supply. A bed composed of a bimodal sediment mixture was installed with a uniform slope and an gradual fining pattern. At the upstream end of the flume the initial bed consisted of 100% gravel, which decreased stepwise (10% steps) in...
conference paper 2015
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Vogelij, N.A.M. (author)
The stick-slip effect is a quasi-static effect that can occur with every mass-spring system that is subjected to significant amount of friction forces. It is based on the difference between the static and kinetic friction coefficient. If the relative velocity between two objects is zero, the sliding object will normally encounter a larger...
master thesis 2015
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Blokker, N.C.M. (author)
Alginate-like exopolysaccharides (ALE) can be extracted from granular sludge, which is produced during aerobic granular sludge waste water treatment as a waste product. Processing the waste is a costly operation. It is believed that ALE consist mostly of alginates. The chemical and mechanical properties of alginates are potential for the...
master thesis 2014
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Doorn, F.A. (author)
This study develops a theoretical framework to judge in which particular instances a two-dimensional depth-averaged model is sufficient to simulate flow processes in continental shelf seas or when a fully three-dimensional model is required for accurate results. A depth-averaged model does not give any vertical information, which is unfortunate...
master thesis 2014
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