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.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
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
Author : EHSAN JAFARI NODOUSHAN(1), MOHANNA TAJNESAIE(2), AHMAD SHAKIBAEINIA(3) & KHOSROW HOSSEINI (4)
ABSTRACT
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
Download Now