IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Lagrangian numerical modelling of rapid multiphase sediment transport
Lagrangian numerical modelling of rapid multiphase sediment transport
Rapid sediment motion, usually induced by highly erosive and transient flow in fluvial and coastal environments, is
commonly encountered in many geo-morphological and engineering problems. Mobile-bed dam-break, submarine
landslide, river bank failure and sediment flushing in reservoirs are only few examples of these problems. Accurate
prediction the complexities involved in this water-sediment system (a multiphase dense granular flow system) is still a
major challenge for many convention mesh-based models. Due to their ability to handle the high interfacial deformations
and fragmentations, the mesh-free Lagrangian methods can provide a unique opportunity to deal with such complexities.
This study aims to develop a multiphase mesh-free Lagrangian model, based on the Moving particle Semi-Implicit (MPS)
formulation, for simulation of rapid transport of non-cohesive sediments. The sediment material is treated as a continuum
(a non-Newtonian fluid) and visco-plastic rheological model is used to predict its local shear stress and effective viscosity.
The model is validated for the cases of dry sediment slump and mobile-bed dam-break. The results of this study will not
only evaluate the use mesh-free Lagrangian models for rapid sediment transport, but also provide a more thorough
understanding of the complex mechanism and processes involved in rapid flow of sediments.
File Size : 727,915 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 18/08/2015
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