Contribution of the transport of suspended particles to the internal erosion in soils. Particle migration in porous media

2007 ◽  
Vol 11 (4) ◽  
pp. 493-506
Author(s):  
Ahmed Benamar ◽  
Nasr-Dine Ahfir ◽  
Abdellah Alem ◽  
Huaqing Wang
Keyword(s):  
Porous Media ◽  
Suspended Particles ◽  
Particle Migration ◽  
Internal Erosion

scholarly journals Numerical Simulation of the Fluid–Solid Coupling Mechanism of Internal Erosion in Granular Soil

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 137 ◽  
Author(s):  
Yu Wang ◽  
Junrui Chai ◽  
Zengguang Xu ◽  
Yuan Qin ◽  
Xin Wang
Keyword(s):  
Numerical Model ◽  
Information Exchange ◽  
Stokes Equations ◽  
Exchange Process ◽  
Hydraulic Gradient ◽  
Solid Particles ◽  
Particle Migration ◽  
Internal Erosion ◽  
Particle Flow Code ◽  
Coupling Mechanism

Internal erosion involves migration and loss of soil particles due to seepage. The process of fluid–solid interaction is a complex multiphase, coupled nonlinear dynamic problem. In this study, we used Particle Flow Code (PFC3D, three-dimensional PFC) software to model solid particles, and we applied computational fluid dynamics (CFD) and the coarse mesh element method to solve the local Navier–Stokes equations. An information-exchange process for the PFC3D and CFD calculations was used to achieve fluid–solid coupling. We developed a numerical model for internal erosion of the soil and conducted relevant experiments to verify the usability of the numerical model. The mechanism of internal erosion was observed by analyzing the evolution of model particle migration, contact force, porosity, particle velocity, and mass-loss measurement. Moreover, we provide some ideas for improving the calculation efficiency of the model. This model can be used to predict the initiation hydraulic gradient and skeleton-deformation hydraulic gradient, which can be used for the design of internal erosion control.

An Experimental Setup with Radial Injection for Investigation of Transport and Deposition of Suspended Particles in Porous Media

2017 ◽  
Vol 40 (6) ◽  
pp. 20160032
Author(s):  
Sadok Feia ◽  
Jean-Claude Dupla ◽  
Jean Canou ◽  
Siavash Ghabezloo ◽  
Jean Sulem ◽  
...  
Keyword(s):  
Porous Media ◽  
Suspended Particles ◽  
Experimental Setup ◽  
Radial Injection

Porous media grain size distribution and hydrodynamic forces effects on transport and deposition of suspended particles

2017 ◽  
Vol 53 ◽  
pp. 161-172 ◽  
Author(s):  
Nasre-Dine Ahfir ◽  
Ahmed Hammadi ◽  
Abdellah Alem ◽  
HuaQing Wang ◽  
Gilbert Le Bras ◽  
...  
Keyword(s):  
Grain Size ◽  
Porous Media ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Suspended Particles ◽  
Hydrodynamic Forces

Modeling of Particle Migration in Porous Media: Application to Soil Suffusion

2016 ◽  
Vol 113 (3) ◽  
pp. 591-606 ◽  
Author(s):  
Ahmed Chetti ◽  
Ahmed Benamar ◽  
Abdelkrim Hazzab
Keyword(s):  
Porous Media ◽  
Particle Migration

scholarly journals Internal Instability in Soils: A Critical Review of the Fundamentals and Ramifications

2021 ◽  
pp. 036119812110569
Author(s):  
Sandun M. Dassanayake ◽  
Ahmad A Mousa ◽  
Saman Ilankoon ◽  
Gary J Fowmes
Keyword(s):  
Structural Integrity ◽  
Empirical Studies ◽  
Particle Migration ◽  
Internal Erosion ◽  
Computational Techniques ◽  
Theoretical Understanding ◽  
Soil Matrix ◽  
Internal Instability ◽  
Classical Studies ◽  
Fine Particle Migration

Seepage-induced fine-particle migration that leads to a change in the conductivity of a soil matrix is referred to as internal instability. This could jeopardize the structural integrity of the soil matrix by initiating suffusion (or suffosion), a form of internal erosion. Susceptibility to suffusion has been studied mostly under extreme laboratory conditions to develop empirical design criteria, which are typically based on the particle size distribution. The physics governing the process have not been comprehensively uncovered in the classical studies because of experimental limitations. Mainstream evaluation methods often over-idealize the suffusion process, holding a probabilistic perspective for estimating constriction sizes and fines migration. Prospective studies on constitutive modeling techniques and modern computational techniques have allowed a more representative evaluation and deeper insight into the problem. Recent advances in sensing technologies, visualization, and tracking techniques have equally enriched the quality of the data on suffusion. This paper sets out to present the long-standing knowledge on the internal instability phenomenon in soils. An attempt is made to pinpoint ambiguities and underscore research gaps. The classical empirical studies and modern visualizing techniques are integrated with particle-based numerical simulations to strengthen the theoretical understanding of the phenomenon.

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