scholarly journals FEM Simulation of Coupled Flow and Bed Morphodynamic Interactions due to Sediment Transport Phenomena

2013 ◽  
Vol 7 (2) ◽  
pp. 306-321 ◽  
Author(s):  
Jose Jeronimo CAMATA ◽  
Renato Nascimento ELIAS ◽  
Alvaro Luiz Gayosode Azeredo COUTINHO
Keyword(s):  
Sediment Transport ◽  
Transport Phenomena ◽  
Fem Simulation ◽  
Coupled Flow

Sediment transport modelling in combined sewer

1996 ◽  
Vol 33 (9) ◽  
pp. 61-67 ◽  
Author(s):  
Lin Huseng ◽  
Benoit Le Guennec
Keyword(s):  
Sediment Transport ◽  
Transport Theory ◽  
Particle Density ◽  
Transport Phenomena ◽  
Transport Modelling ◽  
Channel Geometry ◽  
Uniform Particles ◽  
Combined Sewer ◽  
Solid Transport ◽  
Sediment Transport Modelling

The classical solid transport theory has been used to analyse the experimental results obtained from the No. 13 combined sewer trunk of Marseille for more than two years. This study demonstrates that the sediment transport phenomena in a combined sewer trunk are nothing other than the classical ones. A numerical model has been established according to the analyses. Based on a permanent flow regime, this model considers not only the effects of the real channel geometry, non-uniform particles size, but also the coexistence of mineral and organically materials. Some particular sediment transport phenomena such as the armouring of bed have also been taken into account. It also shows that although the influence of the suspension particles is not necessarily considered, the simulation including the variations of particle density with each granular fraction may be improved.

scholarly journals Modeling of Breaching Due to Overtopping Flow and Waves Based on Coupled Flow and Sediment Transport

Water ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 4283-4304 ◽  
Author(s):  
Zhiguo He ◽  
Peng Hu ◽  
Liang Zhao ◽  
Gangfeng Wu ◽  
Thomas Pähtz
Keyword(s):  
Sediment Transport ◽  
Coupled Flow ◽  
Flow And Sediment Transport

scholarly journals An instability theory for the formation of ribbed moraine, drumlins and mega-scale glacial lineations

2014 ◽  
Vol 470 (2171) ◽  
pp. 20140185 ◽  
Author(s):  
A. C. Fowler ◽  
M. Chapwanya
Keyword(s):  
Sediment Transport ◽  
Three Dimensional ◽  
Water Film ◽  
Transport Processes ◽  
Pressure Gradients ◽  
Coupled Flow ◽  
Fluvial Sediment ◽  
Instability Theory ◽  
Newtonian Viscous Fluid ◽  
Fluvial Sediment Transport

We present a theory for the coupled flow of ice, subglacial water and subglacial sediment, which is designed to represent the processes which occur at the bed of an ice sheet. The ice is assumed to flow as a Newtonian viscous fluid, the water can flow between the till and the ice as a thin film, which may thicken to form streams or cavities, and the till is assumed to be transported, either through shearing by the ice, squeezing by pressure gradients in the till, or by fluvial sediment transport processes in streams or cavities. In previous studies, it was shown that the dependence of ice sliding velocity on effective pressure provided a mechanism for the generation of bedforms resembling ribbed moraine, while the dependence of fluvial sediment transport on water film depth provides a mechanism for the generation of bedforms resembling mega-scale glacial lineations. Here, we combine these two processes in a single model, and show that, depending largely on the granulometry of the till, instability can occur in a range of types which range from ribbed moraine through three-dimensional drumlins to mega-scale glacial lineations.

A Laboratory Study of Sediment Transport in Free Surface Flow

2005 ◽  
Author(s):  
Alfred D. Parr
Keyword(s):  
Sediment Transport ◽  
Transport Phenomena ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Local Scour ◽  
Bridge Piers ◽  
Bed Load ◽  
Dimension Lumber ◽  
Hands On ◽  
Bed Forms

This paper discusses an undergraduate fluid mechanics laboratory session. The lab allows the students to observe various sediment transport phenomena in a hands-on manner. The experiments are performed in a glass-walled, tilting sediment flume. The following sediment transport phenomena are created and observed by the students — bed load, suspended load, bed forms (ripples, dunes, antidunes...), surface waves over various bed forms and local scour at flow obstructions including bridge piers and abutments. Students are able to observe local scour using PVC pipes for bridge piers and dimension lumber for abutment scour. Since the flume is 12.2-m long, a large group of students can spread out along both sides of the flume to observe bed forms and to perform local scour tests.

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