Fluid–Solid Transport in Ducts

2005 ◽  
pp. 196-296
Keyword(s):  
Solid Transport

Modelling solid transport in building drainage systems

1996 ◽  
Vol 33 (9) ◽  
pp. 9-16 ◽  
Author(s):  
John A. Swaffield ◽  
John A. McDougall
Keyword(s):  
Decision Making ◽  
Boundary Conditions ◽  
Numerical Solution ◽  
Water Conservation ◽  
Transient Flow ◽  
Drainage System ◽  
System Model ◽  
Flow Depth ◽  
Flow Conditions ◽  
Solid Transport

The transient flow conditions within a building drainage system may be simulated by the numerical solution of the defining equations of momentum and continuity, coupled to a knowledge of the boundary conditions representing either appliances discharging to the network or particular network terminations. While the fundamental mathematics has long been available, it is the availability of fast, affordable and accessible computing that has allowed the development of the simulations presented in this paper. A drainage system model for unsteady partially filled pipeflow will be presented in this paper. The model is capable of predicting flow depth and rate, and solid velocity, throughout a complex network. The ability of such models to assist in the decision making and design processes will be shown, particularly in such areas as appliance design and water conservation.

scholarly journals Modeling of solid sediment transport in mountain rivers

2020 ◽  
Vol 175 ◽  
pp. 12002 ◽  
Author(s):  
Issam Boukhanef ◽  
Anna Khadzhidi ◽  
Lyudmila Kravchenko ◽  
Zeroual Ayoub ◽  
Kastali Abdennour
Keyword(s):  
Sediment Transport ◽  
Fine Particles ◽  
Agricultural Soils ◽  
Suspended Sediments ◽  
High Water ◽  
The Other ◽  
Concentration Data ◽  
Solid Transport ◽  
One Year ◽  
The One

In Algeria, the problems of erosion and sediment transport are critical, since they have the most dramatic consequences of the degradation of agricultural soils on the one hand and the siltation of the dam on the other .The sediment transport in the Algerian basins is very important especially during the periods of floods, It is in this sense that this study, which consists of estimating the sediment transport in suspension and determining the models of relation linking the liquid discharge and the sediment discharge in order to estimate the solid transport in the absence of suspended sediments concentration data at the Sidi Akkacha station at the outlet of the basin of Oued Allala which is subject to a high water erosion, it degrades from one year to the other under the effect of this phenomenon especially during the floods which drain high amounts of fine particles exceeding in general, the concentration of 150 g/l, the results obtained from the application of the models are very encouraging since the correlation between liquid and solid discharge exceeds 80 %.

scholarly journals ReNovRisk: a multidisciplinary programme to study the cyclonic risks in the South-West Indian Ocean

2021 ◽  
Author(s):  
Pierre Tulet ◽  
Bertrand Aunay ◽  
Guilhem Barruol ◽  
Christelle Barthe ◽  
Remi Belon ◽  
...  
Keyword(s):  
Indian Ocean ◽  
West Indian ◽  
Ocean Basin ◽  
Transport Processes ◽  
The South ◽  
South West Indian Ocean ◽  
South West ◽  
The Face ◽  
West Indian Ocean ◽  
Solid Transport

AbstractToday, resilience in the face of cyclone risks has become a crucial issue for our societies. With climate change, the risk of strong cyclones occurring is expected to intensify significantly and to impact the way of life in many countries. To meet some of the associated challenges, the interdisciplinary ReNovRisk programme aims to study tropical cyclones and their impacts on the South-West Indian Ocean basin. This article is a presentation of the ReNovRisk programme, which is divided into four areas: study of cyclonic hazards, study of erosion and solid transport processes, study of water transfer and swell impacts on the coast, and studies of socio-economic impacts. The first transdisciplinary results of the programme are presented together with the database, which will be open access from mid-2021.

The length of axially segmented lifters in flighted rotary drums: influence on solid transport

2021 ◽  
pp. 1-18
Author(s):  
Joscha Priessen ◽  
Fernando Barths ◽  
Malte Behrens ◽  
Heyko Juergen Schultz
Keyword(s):  
Solid Transport

Investigation of 3C-SiC growth on Si(111) by vapor–liquid–solid transport using a SiGe liquid phase

2012 ◽  
Vol 354 (1) ◽  
pp. 119-128 ◽  
Author(s):  
Stéphane Berckmans ◽  
Laurent Auvray ◽  
Gabriel Ferro ◽  
François Cauwet ◽  
Véronique Soulière ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Vapor Liquid Solid ◽  
Solid Transport ◽  
Vapor Liquid

Solid Transport Models and Evolution of the Seabed

2013 ◽  
pp. 335-369
Author(s):  
Benoît Le Guennec ◽  
Jean-Michel Tanguy
Keyword(s):  
Transport Models ◽  
Solid Transport

scholarly journals Coupled method for the numerical simulation of 1D shallow water and Exner transport equations in channels with variable cross-section

2018 ◽  
Vol 40 ◽  
pp. 05012
Author(s):  
Sergio Martínez-Aranda ◽  
Javier Murillo ◽  
Pilar García-Navarro
Keyword(s):  
Shallow Water ◽  
Finite Volume ◽  
Cross Section ◽  
Physical Phenomenon ◽  
Mathematical Expression ◽  
Channel Cross Section ◽  
Finite Volume Scheme ◽  
Variable Cross ◽  
Volume Scheme ◽  
Solid Transport

This work is focused on the a numerical finite volume scheme for the resulting coupled shallow water-Exner system in 1D applications with arbitrary geometry. The mathematical expression modeling the the hydrodynamic and morphodynamic components of the physical phenomenon are treated to deal with cross-section shape variations and empirical solid discharge estimations. The resulting coupled system of equations can be rewritten as a nonconservative hyperbolic system with three moving waves and one stationary wave to account for the source terms discretization. But, even for the simplest solid transport models as the Grass law, to find a linearized Jacobian matrix of the system can be a challenge if one considers arbitrary shape channels. Moreover, the bottom channel slope variations depends on the erosion-deposition mechanism considered to update the channel cross-section profile. In this paper a numerical finite volume scheme is proposed, based on an augmented Roe solver (first order accurate in time and space) and dealing with solid transport flux variations caused by the channel geometry changes. Channel crosssection variations lead to the appearance of a new solid flux source term which should be discretized properly. Comparison of the numerical results for several analytical and experimental cases demonstrate the effectiveness, exact wellbalanceness and accuracy of the scheme.

scholarly journals Stream Power Determination in GIS: An Index to Evaluate the Most ’Sensitive’Points of a River

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1145 ◽  
Author(s):  
Pierluigi De Rosa ◽  
Andrea Fredduzzi ◽  
Corrado Cencetti
Keyword(s):  
Methodological Approach ◽  
Main Stream ◽  
Stream Power ◽  
Digital Elevation ◽  
Original Definition ◽  
Study Support ◽  
Solid Transport ◽  
Gis Environment ◽  
Standardized Screening ◽  
Hydrographic Network

This paper focuses on the problem of measuring stream power in a hydrographic network using the original definition provided by Bagnold in 1996. Recent digital elevation models have enabled the calculation of channel gradients and, consequently, stream power with a finer spatial resolution, and this has created promising and novel opportunities to investigate river geomorphological processes and forms. The work carried out in this study includes defining and implementing a methodological approach that could be automated within a geographic information system and that meets two requirements: (1) it uses a DEM as input data at a suitable resolution; (2) it estimates the stream power Ω , as well as its variability along the considered stream, in the best possible way using available data. In particular, the methodological approach was implemented in a GIS environment (GRASS GIS) and applied to a sample basin to highlight the variability in Ω along the main stream and its most important tributaries. The sudden and more substantial variations in stream power were then related to the processes acting in the fluvial system. This approach made it possible to highlight how erosion, solid transport, and sedimentation phenomena occurring along the fluvial reaches are related to abrupt variations (increase/decrease) in the “power” available. The results of this study support the idea that the automated and standardized screening of stream power variability along a stream can be used as a preliminary diagnostic element to identify the most “sensitive” points of the stream on which to concentrate subsequent investigations (field checks to verify the causes), with the aim of mitigating risks due to the dynamics of the riverbed.

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