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Verbeek, Merel C. (author), Talstra, H. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)Tidal stream turbines are becoming an affordable option for harvesting sustainable energy in coastal areas. They can be retrofitted in barrages, providing an integral solution for flood protection and emission-free power generation, within environmental constraints. To optimize the turbine-barrage configuration with respect to these...journal article 2024
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Zou, P. (author), Ruiter, N. (author), Uijttewaal, W.S.J. (author), Chen, X. (author), Peters, D.J. (author), Bricker, J.D. (author)Marine biofouling is a major concern in the operational performance of submerged floating tunnels (SFTs). The objective of this research is to investigate the effects of marine fouling (represented by surface roughness) on the hydrodynamic behavior of SFTs, including the hydrodynamic forces on the SFT subject to current-only, wave-only, and...journal article 2023
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Zou, P. (author), Kim, Taeksang (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)The modelling of complex free surface flows is challenging due to the mobility and deformability of the interface and air entrainment characteristics, which are highly affected by turbulence. With the framework of Reynolds averaged Navier–Stokes (RANS) models and the volume of fluid (VOF) method, turbulence quantities at the air–water...journal article 2023
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Zou, P. (author), Ruiter, N. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)The effects of surface roughness as induced by marine fouling on the hydrodynamic forces on a submerged floating tunnel (SFT) are experimentally and numerically investigated in detail at Reynolds numbers Re = 8.125 × 10<sup>3</sup>–5.25 × 10<sup>4</sup>. A sensitivity analysis to different roughness parameters including roughness height,...journal article 2023
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Wei, P. (author), Uijttewaal, W.S.J. (author), Spanjers, H. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)Gas-mixing is commonly applied in anaerobic digesters, yet the resulting flow and hydraulic mixing are difficult to evaluate because of limited full-scale experimental data and uncertainties in integrating sludge rheological data. This study used computational fluid dynamics (CFD) to assess the impact of treated sludge rheology on flow and...journal article 2023
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Zou, P. (author), Bricker, J.D. (author), Chen, L. Z. (author), Uijttewaal, W.S.J. (author), Ferreira, Carlos (author)In order to assess the dynamic performance of a submerged floating tunnel (SFT) subject to flow-induced vibration (FIV) conditions in a practical engineering application, a one-way fluid–structure interaction (FSI) model consisting of multi-scale hydrodynamic solvers combined with the finite element method (FEM) is established. A typical long...journal article 2022
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Hu, Z. (author), Lian, S. (author), Zitman, T.J. (author), Wang, H. (author), He, Z. (author), Wei, H. (author), Ren, L. (author), Uijttewaal, W.S.J. (author), Suzuki, T. (author)Wave height attenuation in vegetation canopies is often all attributed to the drag force exerted by vegetation, whereas other potential dissipation process is often neglected. Previous studies without vegetation have found that opposing currents can induce wave breaking and greatly increase dissipation. It is not clear if similar process may...journal article 2022
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Verbeek, Merel C. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)The tidal flow between bridge pillars and through open barriers is a promising source of ocean energy which can be exploited using tidal stream turbines, as proven recently by operational demonstration plants. The aim of this study is to clarify the consequences for the power output of tidal turbines when placing them in a hydraulic structure...journal article 2021
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Gijón Mancheño, A. (author), Jansen, Wiljan (author), Winterwerp, J.C. (author), Uijttewaal, W.S.J. (author)Mangrove vegetation provides natural protection against coastal hazards like flooding and erosion. In spite of their economic and societal value, mangrove forests have experienced a worldwide decline due to human activities. Bamboo structures, formed by poles driven into the soil, are being used to create a sheltered environment for mangrove...journal article 2021
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Wei, P. (author), Uijttewaal, W.S.J. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)Accurate rheological characterisation of sewage waste activated sludge (WAS) is of high importance for downstream processing related to optimised sludge pumping and mixing, assessment of energy demands and overall process design. However, to elaborate rheological behaviour is often challenging under dynamic operational conditions in practice....journal article 2021
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Gijón Mancheño, A. (author), Jansen, W. (author), Uijttewaal, W.S.J. (author), Reniers, A.J.H.M. (author), van Rooijen, A. A. (author), Suzuki, T. (author), Etminan, V. (author), Winterwerp, J.C. (author)Mangrove vegetation constitutes a natural coastal defence against waves and erosion. Despite their protective role, mangrove ecosystems have experienced continuous degradation over the last decades due to human causes. At retreating mangrove coastlines, bamboo structures are built to create new habitat for mangrove colonization. Existing...journal article 2021
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Zou, P. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)The interaction between an oceanic internal solitary wave (ISW) and a prototype submerged floating tunnel (SFT) is numerically investigated. Effect of oceanic internal solitary wave amplitude, the relative distance of the SFT to the pycnocline, cross-sectional geometry of the SFT, and the density ratio of the two fluid layers are analyzed. At...journal article 2021
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Zou, P. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)Concepts of a submerged floating tunnel (SFT) for novel sea-crossings have been researched in recent years. An SFT tube should be moored afloat by tensioned mooring systems to maintain the tube position under complex hydrodynamic loads. In-line force is amongst the dominant hydrodynamic parameters in the SFT cross-section design and the...journal article 2021
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Alhaddad, S.M.S. (author), de Wit, Lynyrd (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)Breaching flow slides result in a turbidity current running over and directly interacting with the eroding, submarine slope surface, thereby promoting further sediment erosion. The investigation and understanding of this current are crucial, as it is the main parameter influencing the failure evolution and fate of sediment during the breaching...journal article 2020
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Alhaddad, S.M.S. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)Breaching flow slides are accompanied by the generation of turbidity currents. Measurements of these currents are critical for understanding the interaction between the turbidity current and the slope surface, as well as for the validation of numerical models. However, there are insufficient data available detailing the velocity distribution or...journal article 2020
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Honingh, D.F. (author), van Emmerik, Tim (author), Uijttewaal, W.S.J. (author), Kardhana, Hadi (author), Hoes, O.A.C. (author), van de Giesen, N.C. (author)Plastic debris in water systems is a major challenge for our ecosystem, because it is extremely persistent in the environment. Apart from the importance of reducing the amount of plastic entering the ocean, clearing the rivers from debris is important for societal concerns, such as flood risks. Plastic waste accumulation at trash racks leads...journal article 2020
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Verbeek, Merel C. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)Coastal infrastructure, such as bridges and storm surge barriers with weirs, provides an attractive location for harvesting renewable energy using tidal turbines. Often stone layers are applied downstream of coastal infrastructure to protect the sea bed from erosion. However, little is known about the potential effect of tidal energy...journal article 2020
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Verbeek, Merel C. (author), Labeur, R.J. (author), Uijttewaal, W.S.J. (author)An economical way to harvest tidal energy is by integrating free stream turbines in coastal infrastructure. While numerous studies have investigated how turbines should be arranged in idealized geometries to optimize their performance, only a few have considered the influence of realistic bed features. This research investigates the influence...journal article 2020
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Duro, G. (author), Crosato, A. (author), Kleinhans, M. G. (author), Roelvink, D. (author), Uijttewaal, W.S.J. (author)Vessel-induced waves affect the morphology and ecology of banks and shorelines around the world. In rivers used as waterways, ship passages contribute to the erosion of unprotected banks, but their short- and long-term impacts remain unclear. This work investigates the effects of navigation on bank erosion along a reach of the regulated Meuse...journal article 2020
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Zou, P. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)The cross-section geometry of a submerged floating tunnel (SFT) has a large effect on hydrodynamic characteristics, structural behavior and service level, making the tunnel cross section the primary factor in optimizing efficiency. Minimizing the mean drag and the dynamic variability in the lift of the SFT cross section under bi-directional ...journal article 2020