Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Worldwide, the failure of river dikes causes a large number of casualties and flood damage. Different failure modes can induce the collapse of these structures; but overtopping is by far the most frequent one. Although many studies were conducted to better understand the breaching process, most of them focused on dam configurations (i.e. flow normal to the structure) or on coastal dikes. In this research, we aim to improve the current understanding of the breaching of river dikes (i.e. flow parallel to the structure), which differs significantly from the frontal configuration. The objective is to contribute to the development of a numerical tool able to predict the evolution of a breach and the induced flow in river dikes undergoing overtopping.
The present research is structured along two main lines. On the one hand, an experimental model was built in the laboratory of Engineering Hydraulics at the University of Liege in order to collect experimental data which give a better insight into the physical processes involved in the dike breaching. Specifically, the experimental observations highlight the influence of the upstream flow conditions (in the main channel) on the shape of the breach and on its dynamic evolution (deepening vs. widening).
On the other hand, three numerical models of increasing complexity were studied and compared with existing data. The three models include a hydraulic module and a breaching module; but they differ in the representation of the flow (simple assumption such as constant head vs. fully dynamic flow model). After successfully validating the upgrades that we coded in these models, we performed numerical simulations of our experimental tests. The results demonstrate that the model is operational and provides some indications on dike breaching process. However, the module computing the breach geometry evolution is still at an early stage and needs further refinements based on more experimental tests.

Dike --- Overtopping --- Failure --- Breach --- River --- Ingénierie, informatique & technologie > Ingénierie civile

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Due to the ongoing rise in sea level and increases in extreme wave climates, which consequently change the wave climate, coastal structures such as sea dikes and seawalls are exposed to severe and frequent sea storms. Even though much research related to wave–structure interactions has been carried out, it remains one of the most important and challenging topics in the field of coastal engineering. The recent publications in the Special Issue “Wave Interactions with Coastal Structures” in the Journal of Marine Science and Engineering include a wide range of research, including theoretical/mathematical, experimental, and numerical work related to the interaction between sea waves and coastal structures. These publications address conventional coastal hard structures in deep water zones as well as those located in shallow water zones, such as wave overtopping over shallow foreshores with apartment buildings on dikes. The research findings presented help to improve our knowledge of hydrodynamic processes, and the new approaches and developments presented here will be good benchmarks for future work.

Technology: general issues --- History of engineering & technology --- shallow waters --- wave energy --- coastal erosion --- beach restoration --- submerged breakwaters --- protected nourishments --- wave overtopping --- coastal safety --- flow velocity --- flow depth --- sea dikes --- overtopping reduction --- force reduction --- oblique waves --- storm return wall --- EurOtop manual --- validation --- wave modelling --- shallow foreshore --- dike-mounted vertical wall --- wave impact loads --- OpenFOAM --- average overtopping discharge --- individual volume --- overtopping flow depth --- overtopping flow velocity --- promenade --- vertical wall --- SWASH --- fluid–structure interaction --- waves --- smoothed particle hydrodynamics --- SPH --- Pont del Petroli --- storm Gloria --- inter-model comparison --- DualSPHysics --- wave pressure --- caisson breakwater --- stability --- RANS model --- solitary wave --- fully nonlinear wave --- three-dimensional wave --- partially submerged cylinder --- hollow circular cylinder --- tsunami --- wave --- bore --- flooding --- debris --- numerical modeling --- SPH–FEM coupling --- coastal structures --- n/a --- fluid-structure interaction --- SPH-FEM coupling

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Due to the ongoing rise in sea level and increases in extreme wave climates, which consequently change the wave climate, coastal structures such as sea dikes and seawalls are exposed to severe and frequent sea storms. Even though much research related to wave–structure interactions has been carried out, it remains one of the most important and challenging topics in the field of coastal engineering. The recent publications in the Special Issue “Wave Interactions with Coastal Structures” in the Journal of Marine Science and Engineering include a wide range of research, including theoretical/mathematical, experimental, and numerical work related to the interaction between sea waves and coastal structures. These publications address conventional coastal hard structures in deep water zones as well as those located in shallow water zones, such as wave overtopping over shallow foreshores with apartment buildings on dikes. The research findings presented help to improve our knowledge of hydrodynamic processes, and the new approaches and developments presented here will be good benchmarks for future work.

Technology: general issues --- History of engineering & technology --- shallow waters --- wave energy --- coastal erosion --- beach restoration --- submerged breakwaters --- protected nourishments --- wave overtopping --- coastal safety --- flow velocity --- flow depth --- sea dikes --- overtopping reduction --- force reduction --- oblique waves --- storm return wall --- EurOtop manual --- validation --- wave modelling --- shallow foreshore --- dike-mounted vertical wall --- wave impact loads --- OpenFOAM --- average overtopping discharge --- individual volume --- overtopping flow depth --- overtopping flow velocity --- promenade --- vertical wall --- SWASH --- fluid-structure interaction --- waves --- smoothed particle hydrodynamics --- SPH --- Pont del Petroli --- storm Gloria --- inter-model comparison --- DualSPHysics --- wave pressure --- caisson breakwater --- stability --- RANS model --- solitary wave --- fully nonlinear wave --- three-dimensional wave --- partially submerged cylinder --- hollow circular cylinder --- tsunami --- wave --- bore --- flooding --- debris --- numerical modeling --- SPH-FEM coupling --- coastal structures

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Technologies to harvest marine renewable energies (MREs) are at a pre-commercial stage, and significant R&D progress is still required in order to improve their competitiveness. Therefore, hybridization presents a significant potential, as it fosters synergies among the different harvesting technologies and resources. In the scope of this Special Issue, hybridization is understood in three different manners: (i) combination of technologies to harvest different MREs (e.g., wave energy converters combined with wind turbines); (ii) combination of different working principles to harvest the same resource (e.g., oscillating water column with an overtopping device to harvest wave energy); or (iii) integration of harvesting technologies in multifunctional platforms and structures (e.g., integration of wave energy converters in breakwaters). This Special Issue presents cutting-edge research on the development and testing of hybrid technologies for harvesting MREs and intends to inform interested readers on the most recent advances in this key topic.

Technology: general issues --- History of engineering & technology --- vertical axisymmetric floaters --- arbitrary shape --- breakwater --- diffraction and radiation problem --- hydrodynamic characteristics --- added mass --- damping coefficient --- marine renewable energy --- wind energy --- solar energy --- resource assessment --- hybrid energy systems --- power take-off damping --- wave power device --- experimental testing --- PTO simulator --- uncertainty analysis --- wave energy testing --- experimental set-up --- calibration --- Computational Fluid Dynamics (CFD) modelling --- physical model testing --- Hybrid-Wave Energy Converter (HWEC) --- composite modelling approach --- Oscillating Water Column (OWC) --- Overtopping Device (OTD) --- multi-purpose breakwater --- wave power --- oscillating buoy --- power generation performance --- standing waves --- experimental research --- physical modelling --- wave energy --- breakwaters --- safety --- overtopping --- stability --- offshore wind energy --- CECO --- WindFloat Atlantic --- co-located wind-wave farm

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Technologies to harvest marine renewable energies (MREs) are at a pre-commercial stage, and significant R&D progress is still required in order to improve their competitiveness. Therefore, hybridization presents a significant potential, as it fosters synergies among the different harvesting technologies and resources. In the scope of this Special Issue, hybridization is understood in three different manners: (i) combination of technologies to harvest different MREs (e.g., wave energy converters combined with wind turbines); (ii) combination of different working principles to harvest the same resource (e.g., oscillating water column with an overtopping device to harvest wave energy); or (iii) integration of harvesting technologies in multifunctional platforms and structures (e.g., integration of wave energy converters in breakwaters). This Special Issue presents cutting-edge research on the development and testing of hybrid technologies for harvesting MREs and intends to inform interested readers on the most recent advances in this key topic.

Technology: general issues --- History of engineering & technology --- vertical axisymmetric floaters --- arbitrary shape --- breakwater --- diffraction and radiation problem --- hydrodynamic characteristics --- added mass --- damping coefficient --- marine renewable energy --- wind energy --- solar energy --- resource assessment --- hybrid energy systems --- power take-off damping --- wave power device --- experimental testing --- PTO simulator --- uncertainty analysis --- wave energy testing --- experimental set-up --- calibration --- Computational Fluid Dynamics (CFD) modelling --- physical model testing --- Hybrid-Wave Energy Converter (HWEC) --- composite modelling approach --- Oscillating Water Column (OWC) --- Overtopping Device (OTD) --- multi-purpose breakwater --- wave power --- oscillating buoy --- power generation performance --- standing waves --- experimental research --- physical modelling --- wave energy --- breakwaters --- safety --- overtopping --- stability --- offshore wind energy --- CECO --- WindFloat Atlantic --- co-located wind–wave farm --- n/a --- co-located wind-wave farm