Sand Transport under Irregular and Breaking Waves

Lead Research Organisation: University of Liverpool
Department Name: Civil Engineering and Industrial Design

Abstract

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Publications

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Fernandez-Mora A (2017) RANS-VOF modeling of hydrodynamics and sand transport under full-scale non-breaking and breaking waves in Coastal Engineering Proceedings

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Fernandez-Mora A. (2016) Rans-vof modeling of hydrodynamics and sand transport under full-scale non-breaking and breaking waves in Proceedings of the Coastal Engineering Conference

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Finn J (2016) Particle based modelling and simulation of natural sand dynamics in the wave bottom boundary layer in Journal of Fluid Mechanics

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Finn J (2016) Regimes of sediment-turbulence interaction and guidelines for simulating the multiphase bottom boundary layer in International Journal of Multiphase Flow

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Finn, J. (2014) Numerical simulation of sand ripple evolution in oscillatory boundary layers

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Finn, J. (2014) Eular-Lagrange simulations of sediment transport in oscillatory boundary layers with bedforms

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Li Yaru (2015) Development of a new Euler-Lagrange model for the prediction of scour around offshore structures

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Li, Y (2014) Development of a new Euler-Lagrange model for the prediction of scour around offshore structures

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Luo J (2015) Impacts of sea level rise on morphodynamics in Liverpool Bay in Proceedings of the Institution of Civil Engineers - Maritime Engineering

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Luo J (2013) Numerical modelling of hydrodynamics and sand transport in the tide-dominated coastal-to-estuarine region in Marine Geology

 
Description A new model has been developed based particle approach for simulation of sediment transport, which is fundamentally different from the conventional method. The new model has been approved to be robust and accurate to deal with various conditions that not possible before, see publication 2,3 and 4.

Computer model simulation also starts to reveal the different mechanism of sediment transport under breaking surface waves. Such as the details of sediment flux above sandy ripples are clearly different from that under a non-breaking waves as publication 5 indicated.

In addition, the differences in the details of particle motion under breaking waves has identified in comparison with the non-breaking waves from the model simulations. The results are expected to reveal the fundamental mechanisms that the wave breaking can affect the sediment transport.
Exploitation Route The findings can be used directly for coastal engineers for better scour protection around offshore structures, which is fundamental important for the design and engineering practice.

The new model also provide an new approach to deal with sediment transport prediction, which is clearly different from the conventional approach before. Such a new modelling concept will help wider coastal engineering community, including coastal protection and management, marine energy and environment protection, as well as marine related transport and etc.
Sectors Aerospace, Defence and Marine,Construction,Education,Energy,Environment,Transport
 
Description The current research has been used as foundation for a new CASAE award PhD study, jointly funding by EPSRC and HR Wallingford in coastal scour protections. The PhD research has successfully finished based on the model developed in the present research. HR Wallingford is working actively with our research group to develop this model further for practical application in better design of scour protection around structures.
First Year Of Impact 2020
Sector Aerospace, Defence and Marine,Education,Energy,Environment
Impact Types Economic
 
Description Joint Research Projects NSFC - NWO - EPSRC: Sustainable Deltas
Amount £400,000 (GBP)
Funding ID EP/R024553/1 
Organisation Engineering and Physical Sciences Research Council (EPSRC) 
Sector Public
Country United Kingdom
Start 02/2018 
End 06/2021
 
Title Eulerian-Lagriangian model for sand transport under surface waves 
Description A new Eulerian-Lagriangian model has been develped to simulate sandy particles motion under oscillatory surface waves, including both non-breaing and breaking waves on slopping beach. The model has been developed withing SINBAD project and tested against new experimental data from SINBAD work. A numer of publications have been reported in both journals and internations conferences. 
Type Of Material Computer model/algorithm 
Provided To Others? No  
Impact To simulate sandy particle's motion under surface waves, large amount particles are needed. The concentration region also ranges from very low value to the fully packed condition in which most existing models cannot handel. The newly developed model take into account interparticle collisions and frictions, together with fluid-particle interactions, which enables the model to be able to deal with sediment from fully packed bed up to the low concentration in suspension high above the bed.