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Advanced Numerical Modelling of Wave Structure Interactions
Wave Generation and Absorption Techniques
Introduction
Review of wave generation and absorption methods
Static boundary wave generation and absorption boundary conditions
Relaxation zones
Internal wave makers
Moving wavemakers with active absorption
Discussion
References
Wave Propagation Models for Numerical Wave Tanks
Introduction
Historical development
BEM models
FEM models
Spectral models
Fully Lagrangian models
Lagrangian numerical wave model
Mathematical formulation
Numerical scheme
Numerical dispersion relation and dispersion correction
Numerical treatment of breaking
Numerical efficiency
Model validation
Model application to the evolution of extreme wave groups
Model application to waves on sheared currents
Concluding remarks
References
Wave Breaking and Air Entrainment
Introduction
Physics of breaking
Wave breaker types
Flow structure
Numerical model
Wave breaking of unstable sinusoidal wave
Initial configuration
Splash-up and large vortical structures
A new type of vortical structures under breaking waves
Discussion and future work
References
Air Compressibility and Aeration Effects in Coastal Flows
Introduction
Flow model for dispersed water waves
Mathematical model
Numerical Method
Treatment of the advection equation
Spatial discretisation
The HLLC Riemann solver
Temporal discretisation
Results
D problems
Free drop of a water column in a closed tank
Underwater explosion near a planar rigid wall
Water entry of a rigid plate
Plunging wave impact at a vertical wall
Conclusions
References
Violent Wave Impacts and Loadings using the δ-SPH Method
Introduction
Governing equations
The δ-SPH scheme
Modelling solid bodies
The ghost-fluid method
Evaluation of Forces and Torques through the ghost-fluid method
Algorithm for fluid-body coupling
Energy balance
Applications
Prediction of water impacts
Extreme loads on a Wave Energy Converter (WEC)
Conclusions
References
Wave and Structure Interaction Porous Coastal Structures
Introduction
Literature review
Mathematical formulation
Definitions
RANS equations
Volume-Averaged RANS equations
Closure
Turbulence modelling
Discussion
Numerical model
Applications: Solitary wave impacting into a rubble mound breakwater
Numerical setup
Numerical results
Concluding remarks
Applications: Wave and sediment grain interaction by a nonbreaking solitary wave on a steep slope
Introduction to DEM
Numerical setup
Numerical results
Concluding remarks
Final remarks
References
CFD Modelling of Scour in Flows with Waves and Currents
Introduction
Types of sediment transport models in CFD
The scourFOAM model
Governing equations
Numerical solution technique
The solver
Boundary and initial conditions
Solution procedure
Model applications
D scour application
D scour around a complex foundation
Conclusions
References
A Coupling Strategy for Modelling Dynamics of Moored Floating Structures
Introduction
Uncoupled numerical models
Fluid dynamics
Solid dynamics
An overview of fluid-structure coupling schemes
Monolithic schemes
Partitioned schemes
Coupling instabilities
Coupling strategy
Fluid-structure coupling
Fluid-mooring coupling
Mooring-structure coupling
Case studies
Validation of FSI for floating bodies
Validation of mooring model
Moored floating bodies: the OC4-DeepCwind validation case
Conclusions
Appendices
A On limitations and way forward
B On software development
References
Future Prospects
The lattice Boltzmann method
Arbitrary and hybrid Lagrangian-Eulerian models
Direct pressure and pressure-marching methods
Machine learning
Coupled models
References
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