Searched for: subject:"hydrodynamics"
(1 - 20 of 9,649)

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Jahangir, S. (author)
Cavitation is a well-known phenomenon, occurring in a wide range of applications. In most applications, cavitation is undesirable, such as turbines, pumps, ship propellers and diesel injector nozzles. Cavitation can cause material erosion, flow blockage, noise and degradation of equipment over time. The ability to predict the behavior of this...
doctoral thesis 2020
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de Vet, P.L.M. (author)
Intertidal flats — regions of estuaries that emerge every tide from the water — form unique ecosystems. Benthic communities living in the bed are a valuable food source for wading birds. Salt marshes present on these flats further enhance the biodiversity. Through the damping of waves, intertidal flats also contribute to the safety of the...
doctoral thesis 2020
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Phan, M.H. (author)
Coastal retreat problems occur in many deltas over the world. Coastal features are not constant over time and are affected by sea level rise, river runoff, sediment supply, wave and tidal energy, underlying geology and climate. In addition, human activities profoundly influence the coastal processes as a result of changing natural patterns of...
doctoral thesis 2020
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Verma, Amrit Shankar (author), Castro, Saullo G.P. (author), Jiang, Zhiyu (author), Teuwen, Julie J.E. (author)
The leading edge of a fiber composite wind turbine blade (WTB) is prone to erosion damages due to repeated rain droplet impact during its service life. Such damages are critical to the blade's aerodynamic as well as structural performance, ultimately resulting in substantial repair costs. An effective design of a coating material for WTB is...
journal article 2020
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Yuan, Y. (author), Goni Ros, B. (author), Bui, Ha H. (author), Daamen, W. (author), Vu, Hai L. (author), Hoogendoorn, S.P. (author)
Macroscopic pedestrian models are theoretically simpler than microscopic models, and they can potentially be solved faster while producing reasonable predictions of crowd dynamics. Therefore, they can be very useful for applications such as large-scale simulation, real-time state estimation and crowd management. However, the numerical methods...
journal article 2020
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Mohammadzadeh Moghaddam, E. (author), Foumeny, E. A. (author), Stankiewicz, A.I. (author), Padding, J.T. (author)
The local flow structure and pressure drop in random packings of Raschig rings are analyzed using sequential Rigid Body Dynamics (RBD) method and Computational Fluid Dynamics (CFD) simulation. Tube-to-pellet diameter ratios, N, between 3 and 6 are investigated for laminar, transitional and turbulent flow regimes (5 ≤ Re<sub>p</sub> ≤ 3,000)....
journal article 2020
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Storms, J.E.A. (author), Beylich, Achim A. (author), Hansen, Louise (author), Waldmann, Nicolas (author)
This paper reconstructs the sedimentation volumes and patterns, suspended sediment yields, wind‐induced circulation patterns and sediment trapping efficiency of Lake Strynevatnet, western Norway as an integrated source to sink system. The lake became deglaciated ca 11 ky cal bp, with glacio‐isostatic uplift isolating the basin from the nearby...
journal article 2020
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Keijdener, C. (author)
The Arctic presents a great opportunity for two major industries. First, since the region is expected to contain a significant amount of hydrocarbon reserves, it is very attractive for the oil and gas industry. Second, the receding extent of sea ice is making the region more accessible for shipping and, therefore, an opportunity is emerging for...
doctoral thesis 2019
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Sau, F. (author)
In this thesis, we study scaling and detailed properties of a class of conservative interacting particle systems. In particular, in the first part we derive the hydrodynamic equation for the symmetric exclusion process in presence of dynamic random environment. The second part of the thesis focuses on a detailed property of conservative particle...
doctoral thesis 2019
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Rotteveel, E. (author)
This research focuses on identifying the most important stern shape aspects, with regard to resistance and propulsion power, of inland ships. Such information should help designers to determine which hull form aspect to adjust in case design requirements need them to do so. The information is obtained by firstly conducting a large series of CFD...
doctoral thesis 2019
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Lowe, R. J. (author), Buckley, M. L. (author), Altomare, C. (author), Rijnsdorp, D. P. (author), Yao, Y. (author), Suzuki, T. (author), Bricker, J.D. (author)
In this study we investigated the capabilities of the mesh-free, Lagrangian particle method (Smoothed Particle Hydrodynamics, SPH) to simulate the detailed hydrodynamic processes generated by both spilling and plunging breaking waves within the surf zone. The weakly-compressible SPH code DualSPHysics was applied to simulate wave breaking over...
journal article 2019
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van Ginkel, G.J. (author), Redig, F.H.J. (author)
We consider the symmetric exclusion process on suitable random grids that approximate a compact Riemannian manifold. We prove that a class of random walks on these random grids converge to Brownian motion on the manifold. We then consider the empirical density field of the symmetric exclusion process and prove that it converges to the...
journal article 2019
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Bloemendaal, Nadia (author), Muis, Sanne (author), Haarsma, Reindert J. (author), Verlaan, M. (author), Irazoqui Apecechea, Maialen (author), de Moel, Hans (author), Ward, Philip J. (author), Aerts, Jeroen C.J.H. (author)
We assess the suitability of ECMWF Integrated Forecasting System (IFS) data for the global modeling of tropical cyclone (TC) storm surges. We extract meteorological forcing from the IFS at a 0.225° horizontal resolution for eight historical TCs and simulate the corresponding surges using the global tide and surge model. Maximum surge heights...
journal article 2019
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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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Wei, P. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Spanjers, H.L.F.M. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)
This study aimed to characterise the gas-liquid flow and mixing behaviour in a gas-mixed anaerobic digester by improving phase interaction modelling using Computational Fluid Dynamics (CFD). A 2D axisymmetric model validated with experimental data was set up using an Eulerian-Eulerian method. Uncertainty factors, including bubble size, phase...
journal article 2019
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Keijdener, C. (author), Hendrikse, H. (author), Metrikine, A. (author)
In this paper, the efficacy of an effective fluid model (EFM) is studied for replicating the effects that hydrodynamics has on the interaction between level ice, modeled as a semi-infinite Kirchhoff-Love plate, and a downward sloping structure, modeled as a rigid and immobile body. The proposed EFM is based on a distributed frequency-independent...
conference paper 2019
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Foortse, Bjorn (author), Visser, P.J. (author), Bisschop, Rik (author), van Rhee, C. (author)
Significant reduction of the rate of erosion of a sand bed is obtained when sand is mixed with a small amount of bentonite. In previous experiments this behaviour has already been shown for relatively low flow velocities. In this case, the erosion process is dominated by grain-by-grain erosion, which is characterised by low ratios of the...
journal article 2019
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Mema, I. (author), Mahajan, V.V. (author), Fitzgerald, B. (author), Padding, J.T. (author)
The aim of many industrial processes is to manipulate solid particle aggregates within gas suspensions. Prime examples of such processes include fluidised bed reactors, cyclone separators, and dust collectors. In recent years, fluidised bed reactors have been used in the gasification of biomass particles. When fluidised, these particles are...
journal article 2019
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Vonach, Tanja (author), Kleidorfer, Manfred (author), Rauch, Wolfgang (author), Tscheikner-Gratl, F. (author)
The calibration of models for urban drainage systems has become more and more important as especially the usage of detailed models has increased considerably over the last years as the basis for planning and design. Still the effects originating from the choice of data used for model calibration are little known and advice on planning...
journal article 2019
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Mohammadzadeh Moghaddam, E. (author), Foumeny, E. A. (author), Stankiewicz, A.I. (author), Padding, J.T. (author)
Despite the substantial simplicities inherent in pseudo-continuum models of fixed bed reactors, there is a continued interest in the use of such models for predicting fluid flow and transport scalars. In this paper, we aim to quantitatively address the inadequacy of 2D pseudo-continuum models for narrow-tube fixed beds. We show this by...
journal article 2019
Searched for: subject:"hydrodynamics"
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