Searched for:
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document
Liu, P. (author)
This paper presents the more salient results of an experimental and numerical study on jack-up dynamic behavior. The laboratory studies of three principle jack-up platform models were carried out in both regular and irregular waves. The data from irregular wave tests were analyzed in both the probability domain and frequency domain supported by...
journal article 1991
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Lowe, C.P. (author), Masters, A.J. (author)
Our original article presented computer simulation results for the viscoelastic response of a simple model colloidal suspension. We compared our results for the viscosity with a theoretical prediction of Verberg et al. [R. Verberg, I. M. de Schepper, and E. G. D. Cohen, Phys. Rev. E 55, 3143 (1997)] and found poor agreement. It is suggested in...
journal article 2001
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Bakker, A.F. (author), Lowe, C.P. (author)
In a suspension, the hydrodynamic interactions between particles can propagate by two mechanisms: relatively slowly, by the diffusion of transverse momentum, or relatively rapidly, by the propagation of sound waves. Here we describe computer simulation results for the collective and single particle dynamics of colloidal particles with the aim of...
journal article 2002
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Huijts, K.M.H. (author), Schuttelaars, H.M. (author), De Swart, H.E. (author), Valle-Levinson, A. (author)
Two physical mechanisms leading to lateral accumulation of sediment in tidally dominated estuaries are investigated, involving Coriolis forcing and lateral density gradients. An idealized model is used that consists of the three?dimensional shallow water equations and sediment mass balance. Conditions are assumed to be uniform in the along...
journal article 2006
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Prinsen, P. (author), Odijk, T. (author)
A theory is presented for ?C, the coefficient of the first-order correction in the density of the collective diffusion coefficient, for protein spheres interacting by electrostatic and adhesive forces. An extensive numerical analysis of the Stokesian hydrodynamics of two moving spheres is given so as to gauge the precise impact of lubrication...
journal article 2007
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Ooms, G. (author), Vuik, C. (author), Poesio, P. (author)
A theoretical investigation has been made of core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question of how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...
journal article 2007
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Lam, N.T. (author), Stive, M.J.F. (author), Wang, Z.B. (author), Verhagen, H.J. (author), Thuy, V.T.T. (author)
Hydrodynamics and morphodynamics of a seasonally forced tidal inlet system are investigated using numerical models. The ocean forcing including tidal and wave actions and sediment transport is simulated using Delft3D model. Fluvial processes in Delft3D are taken into account as results from SOBEK RURAL model. Analysis of the numerical simulation...
journal article 2008
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Voogd-Claessen, H. (author), Van Bladel, C. (author), Van Daalen, T. (author), Dekkers, B. (author), Elwick, R. (author), Mulder, F. (author), Nachmany, G. (author)
Rowing is a sport which requires a proper technique, strong core balance, physical strength and endurance. Rowing boats designed for competition are built of epoxy laminate with glass or carbon reinforcement; they are lightweight, stiff, long, and narrow to achieve minimal water resistance. However, this makes them extremely unstable and...
journal article 2010
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Blanckaert, K. (author), De Vriend, H.J. (author)
Despite the rapid evolution of computational power, simulation of meander dynamics by means of reduced and computationally less expensive models remains practically relevant for investigation of large?scale and long?term processes, probabilistic predictions, or rapid assessments. Existing meander models are invariantly based on the assumptions...
journal article 2010
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Blanckaert, K. (author)
The migration rate of sharp meander bends exhibits large variance and indicates that some sharply curved bends tend to stabilize. These observations remain unexplained. This paper examines three hydrodynamic processes in sharp bends with fixed banks and discusses their morphological implications: secondary flow saturation, outer-banks cells, and...
journal article 2011
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Kernkamp, H.W.J. (author), Van Dam, A. (author), Stelling, G.S. (author), De Goede, E.D. (author)
In this paper, a shallow-water flow solver is presented, based on the finite-volume method on unstructured grids The method is suitable for flows that occur in rivers, channels, sewer systems (1D), shallow seas, rivers, overland flow (2D), and estuaries, lakes and shelf breaks (3D). We present an outline of the numerical approach and show three...
journal article 2011
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Greidanus, A.J. (author), Delfos, R. (author), Westerweel, J. (author)
The largest part of hydrodynamic drag during rowing, sailing or canoeing is the turbulent skin friction (80-90%). Higher velocities can be achieved by reducing the friction drag as a result of surface treatment. This research focuses on the development, characterization, and testing of drag-reducing surfaces, like nano- and micro-structured...
journal article 2012
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Ooms, G. (author), Pourquie, M.J.B.M. (author), Beerens, J.C. (author)
A numerical study has been made of horizontal core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...
journal article 2013
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Brändle de Motta, J.C. (author), Breugem, W.P. (author), Gazanion, B. (author), Estivalezes, J.L. (author), Vincent, S. (author), Climent, E. (author)
A general model is presented for short-range hydrodynamic interactions and head-on particle-particle/wall collisions. The model has been embedded in two distinct numerical methods for fully resolved simulation of finite-size particles in a viscous fluid. It accounts for the material properties of the particles and lubrication effects prior to...
journal article 2013
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Platzek, F.W. (author), Stelling, G.S. (author), Jankowski, J.A. (author), Pietrzak, J.D. (author)
Three-dimensional hydrodynamic z-layer models, which are used for simulating the flow in rivers, estuaries, and oceans, suffer from an inaccurate and often discontinuous bottom shear stress representation, due to the staircase bottom. We analyze the governing equations and clearly show the cause of the inaccuracies. Based on the analysis, we...
journal article 2014
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Gourdin-Bertin, S. (author), Chassagne, C. (author), Bernard, O. (author), Jardat, M. (author)
In electrolyte solutions, an electric potential difference, called the Ionic Vibration Potential (IVP), related to the ionic vibration intensity, is generated by the application of an acoustic wave. Several theories based on a mechanical framework have been proposed over the years to predict the IVP for high ionic strengths, in the case where...
journal article 2015
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Pearson, S.G. (author), Storlazzi, C.D. (author), van Dongeren, A. R. (author), Tissier, M.F.S. (author), Reniers, A.J.H.M. (author)
Many low-elevation, coral reef-lined, tropical coasts are vulnerable to the effects of climate change, sea level rise, and wave-induced flooding. The considerable morphological diversity of these coasts and the variability of the hydrodynamic forcing that they are exposed to make predicting wave-induced flooding a challenge. A process-based...
journal article 2017
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de Vet, P.L.M. (author), van Prooijen, B.C. (author), Schrijvershof, R. A. (author), van der Werf, J. J. (author), Ysebaert, T. (author), Schrijver, M. C. (author), Wang, Z.B. (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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Klaver, S. (author), Nederhoff, C. M. (author), Giardino, A (author), Tissier, M.F.S. (author), van Dongeren, A. R. (author), van der Spek, A.J.F. (author)
Small island developing states are among the most vulnerable areas to the impact of natural hazards and climate change. Flooding due to storm surges and extreme waves, coastal erosion, and salinization of freshwater lenses are already a serious threat and could lead to irreversible consequences in the coming decades. Reef flat mining is one...
journal article 2019
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