Searched for: subject:"shallow%5C+water"
(1 - 20 of 49)

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Bisdom, K. (author), Bertotti, G. (author), Bezerra, Francisco Hilário Rego (author)

Regional natural fracture networks often show variations on a scale below that captured by seismic reflection data. This variability is not considered in most reservoir models, but likely impacts uncertainties in permeability. We quantify this uncertainty using a database of 13,000 fractures in nine outcrops digitised in the carbonate...

journal article 2017
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Rotteveel, E. (author), van der Ploeg, A (author), Hekkenberg, R.G. (author)
Shallow water effects change the flow around a ship significantly which can affect the optimum design of the hull. This paper describes a study into the optimization of the aft ship region for various water depths. The research focuses on variations of the following parameters of a hull form: The athwart ship’s propeller location, the tunnel top...
conference paper 2016
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Liu, J. (author), Hekkenberg, R.G. (author)
An accurate estimation of the rudder forces and moments is essential for manoeuvrability prediction. Previous research has shown that ships have different manoeuvring performance in deep and shallow water. Before considering the rudder’s contribution to shallow water manoeuvring, it is meaningful to analyse the shallow water effects on the...
conference paper 2016
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Rotteveel, E. (author), Hekkenberg, R.G. (author)
Effects of a hull form variation and shallow water on a 110-meter inland ship are presented as preliminary results of the Top Ships project, which is initiated in order to improve inland ship design tools and design guidelines.
conference paper 2015
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Rotteveel, E. (author), Hekkenberg, R.G. (author), Liu, J. (author)
For inland ships, state-of-the-art hull form design is to a large extent based on experience, common sense, or adjusting previous designs. The idea therefore arises that further optimization is possible if the right knowledge is available. This knowledge is insufficiently available due to two main reasons. First, research into inland ship...
conference paper 2014
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Volp, N.D. (author), Van Prooijen, B.C. (author), Stelling, G.S. (author)
This study presents a finite volume hydrodynamic model for shallow water flow that computes on a coarse grid, but accounts for high-resolution bathymetry and roughness variations on a subgrid. The detailed information can be incorporated by using the assumption of a uniform flow direction and a uniform friction slope within a part of a coarse...
journal article 2013
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Alebregtse, N.C. (author), De Swart, H.E. (author), Schuttelaars, H.M. (author)
journal article 2013
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Kleptsova, O. (author)
In this thesis a z?layer unstructured C-grid finite volume hydrostatic model is presented. An efficient and highly scalable implicit technique for the solution of the free surface equation is combined with an Eulerian approach for the advection of momentum. A consistent velocity reconstruc- tion procedure which not only satisfies the continuity...
doctoral thesis 2013
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Toxopeus, S.L. (author)
In the SIMMAN 2008 workshop, the capability of CFD tools to predict the flow around manoeuvring ships has been investigated. It was decided to continue this effort but to extend the work to the flow around ships in shallow water. In this paper, CFD calculations for the KLVCC2 are presented. The aim of the study is to verify and validate the...
conference paper 2011
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Kleptsova, O. (author), Stelling, G.S. (author), Pietrzak, J.D. (author)
In this paper, we focus on a conservative momentum advection discretisation in the presence of zlayers. While in the 2Dcase conservation ofmomentum is achieved automatically for an Eulerian advection scheme, special attention is required in the multi-layer case. We show here that an artificial vertical structure of the flow can be introduced...
journal article 2010
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Chernetsky, A.S. (author), Schuttelaars, H.M. (author), Talke, S.A. (author)
Over decades and centuries, the mean depth of estuaries changes due to sea-level rise, land subsidence, infilling, and dredging projects. These processes produce changes in relative roughness (friction) and mixing, resulting in fundamental changes in the characteristics of the horizontal (velocity) and vertical tides (sea surface elevation) and...
journal article 2010
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Badri, M.A. (author), Wilders, P. (author), Azimian, A.R. (author)
Hydrodynamic simulations of tidal currents in the Persian Gulf are presented. Water surface level and velocity have been determined by a Kelvin wave expansion as a new hydrodynamic calibration tool for estimating the dynamical field and flow patterns. In the procedure, leading to the Kelvin wave expansion, data of tidal constituents from co...
report 2010
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Verhagen, H.J. (author), Mertens, M. (author)
In the Rock Manual [2007] two sets of equations for the determination of rock stability in breakwaters armour layers are presented. One set is the original formula presented by Van der Meer [1988], valid for deep water conditions. This set uses the parameters Hs and Tm. The other set is an adaptation of these formulae, using the parameters H2%...
conference paper 2009
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Kai, C. (author)
Coastal zones which are known as the interface between continents and oceans are vital and important to human beings because a majority of the world's population live in such zones (Nelson, 2007). Coastal systems are among the most dynamic and energetic environments on earth and they are continuously changing because of the dynamic interaction...
report 2009
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Verhagen, H.J. (author), Van Vledder, G.P. (author), Eslami Arab, S. (author)
Modern design formula for coastal structures (like rock stability formula and overtopping formula use wave parameters (H2% and Tm-1,0) which are not readily available from standard boundary condition wave data. For transforming values like Hs and Tp to the parameters used in the new formulas, often-fixed conversion factors are used. However,...
conference paper 2008
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Westhuysen, A.J. van der (author), Vledder, G.P. van (author)
report 2007
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Gejadze, I.Y. (author), Monnier, J. (author)
In the context of river hydraulics, we develop the idea of a richer local zoom model superposed to a given global model. The local zoom model (2D shallow water equations in flooded parts) describes additional physical phenomena which are not represented by the basic global model (1D shallow-water equations with storage area). The weak coupling...
conference paper 2006
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Djadel, K. (author), Ern, A. (author), Piperno, S. (author)
Shallow-Water Equations are encountered in many applications related to hydraulics, flood propagation or dam break problems. This set of nonlinear hyperbolic equations models a fluid flow in a domain where the depth of the fluid is much lower than its horizontal dimensions. Usually, these equations are treated using Finite Difference, Finite...
conference paper 2006
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Verhagen, H.J. (author), Reedijk, B. (author), Muttray, M. (author)
Experience has shown that stability parameters for breakwater armour are different for steep and shallow foreshores, as well as for deep and shallow water. A change from a deep water spectral information (Tm0) to shallow water spectral information (Tm-1,0) does not completely explains this difference. Tests have shown that stability also depends...
conference paper 2006
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Groeneweg, J. (author), Dingemans, M.W. (author)
report 2003
Searched for: subject:"shallow%5C+water"
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