Searched for: subject%3A%22modeling%22
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Stelling, G.S. (author), Wang, L.X. (author)
An unsteady, separating flow with a free surface was investigated with a physical model and a numerical model. To simulate tidal flow, the prescribed flow rate at the inflow boundary was a half-period sine function of time. Measurements of velocities and wave heights were conducted by using LDV and a wave-height meter in a straight open channel...
report 1984
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Otta, A.K. (author), Dingemans, M.W. (author)
This report describes the formulation, numerical implementation and application of a weakly nonlinear wave model for finite depth based on a Hamiltonian formulation (see Radder, 1992). Due to the type of non-linearity explicitly accounted for in the expansion of the kernel of the Hamiltonian density (sum of kinetic and potential energy per unit...
report 1994
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Geers, M.G.D. (author), Peijs, T. (author), Brekelmans, W.A.M. (author), De Borst, R. (author)
journal article 1996
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Leendertse, J.J. (author)
This report describes a method for radiating disturbances generated in the computational field through the radiating boundaries. First a simulation is made without disturbances (such as a storm surge) subsequently a second simulation is made with the radiating boundary conditions activated, and the disturbance is able to pass through the...
report 1997
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De Haas, E. (author)
The Storm Surge Barrier in the New Waterway was built to protect the city and port of Rotterdam and the area of the lower Rhine against flooding during extreme conditions. This construction, consisting of two gigantic arc shaped barriers, is to be pivoted into the New Waterway and then lowered in case of an impeding emergency. The arc shape...
master thesis 1998
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De Heij, J. (author)
The first one who studied the problem of armour layer stability was Iribarren (1938). Iribarren derived stability criteria that were based on the acting physical processes on the slope of a structure. In the stability criteria of Iribarren only the influence of a few structural and hydraulic parameters were taken into account. In 1988 Van der...
master thesis 2001
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Jankovic, D. (author), Chopra, M.B. (author), Kunnath, S.K. (author)
This research aims to study the behaviour of the concrete-steel bond using numerical models, taking into account the effect of the different bar embedment length. Both plain and fiber reinforced concrete (FRC) are modeled. The interface bond stress as well as load-displacement response of the reinforcing steel is studied. The asociated cracking...
journal article 2001
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Kuijper, C. (author), Winterwerp, J.C. (author)
report 2003
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van der Klis, H. (author)
doctoral thesis 2003
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Hibma, A. (author)
In this research, the initial formation and long-term evolution of channel-shoal patterns in schematised basins is simulated using a model based on the software package Delft3D. The resulting channel-shoal patterns are validated with field observations, among which the Western Scheldt estuary. This has proven that a complex model is able to...
doctoral thesis 2004
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Werner, M.G.F. (author)
The rapid development of Geographical Information Systems (GIS) has together with the inherent spatial nature of hydrological modelling led to an equally rapid development in the integration between GIS and hydrological models. The advantages of integration are particularly apparent in flood extent modelling. In this thesis, the integration of...
doctoral thesis 2004
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Marciano, R. (author), Wang, Z.B. (author), Hibma, A. (author), De Vriend, H.J. (author), Defina, A. (author)
We model branching channel patterns in short tidal basins with two methods. A theoretical stability analysis leads to a relationship between the number of channels and physical parameters of the tidal system. The analysis reveals that width and spacing of the channels should decrease as the slope of the bottom profile and the Shields parameter...
journal article 2005
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Cui, H. (author)
Weir is the construction widely used in hydraulic engineering. It is very important to investigate the behaviors of the flows over a weir. In general when water streams over a weir it behaves various flow patterns according to different flow conditions. Different flow patterns results in different inference on the water level profile and the...
master thesis 2007
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Lam, N.T. (author), Stive, M.J.F. (author), Verhagen, H.J. (author), Wang, Z.B. (author)
Morphodynamics of a tidal inlet system on a micro-tidal coast in a tropical monsoon influenced region is modeled and discussed. Effects of tides, waves, river flows and system configuration on the inlet morphologies are investigated with the aid of process-based state-of-the-art numerical models. Seasonal and episodic behavior of the inlet...
conference paper 2007
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Zeng, J. (author), Constantinescu, G. (author), Blanckaert, K. (author), Weber, L. (author)
This paper focuses on experiments and simulations conducted in very sharp open-channel bends with flat and equilibrium bathymetry, corresponding to the initial and final phases of the erosion and deposition processes, respectively. The study of flow in curved open bends is relevant for flow in natural river configurations, as most river reaches...
journal article 2008
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Kroon, J. (author)
In numerical modelling of water movement wetting and drying is a well known problem. The governing equations are not valid in the dry part of the computational domain which may result in problems with mass conservation, negative water depths and artificially enlarged gradients. A method is proposed that allows for the surface elevation to become...
master thesis 2009
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De Vet, P.L.M. (author)
The effective thickness of the bedload layer over a river bed can be schematised as the total volume of bedload sediment that is in transport, divided by the surface. In practice, this layer is considered to have a constant thickness over time. Main question of this thesis is whether this assumption is valid. By analyzing the mass balance, it is...
bachelor thesis 2012
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De Vries, S. (author), Van Thiel de Vries, J.S.M. (author), Ruessink, G. (author)
This paper aims to conceptually simulate observed spatial and temporal variability in aeolian sediment transport rates, erosion and deposition on a beach. Traditional strategies of modeling aeolian sediment transport rates do not account for supply limitations that are common on natural beaches. A recently developed 1D linear advection model is...
conference paper 2013
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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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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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