Chapter
Aug 11, 2016
CFD-DEM Modeling of Piping Erosion Considering the Properties of Sands
Authors: Hui Tao and Junliang TaoAuthor Affiliations
Publication: Geo-Chicago 2016
Abstract
Internal erosion has been reported to account for about 50% of the dam and levee failures throughout the world. This paper presents a coupled computational fluid dynamics and discrete element method (CFD-DEM) approach to model piping erosion process in sandy soils. The soil-flow interactions are explained by exchanging the momentum exchange between the two phases. Specifically, flow forces such as buoyant force, drag force and viscous force are considered. The various stages of piping erosion including initial movement, progressive heave and total heave are captured. The required hydraulic gradients to activate the stages are found to be greater than the critical gradient determined by Terzarghi’s theory. In addition, the required hydraulic gradients also change with soil properties including specific gravity and particle size distribution.
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© 2016 American Society of Civil Engineers.
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Published online: Aug 11, 2016
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ASCE Technical Topics:
- Computational fluid dynamics technique
- Continuum mechanics
- Dam failures
- Degrees of freedom
- Disaster risk management
- Disasters and hazards
- Displacement (mechanics)
- Earth materials
- Engineering mechanics
- Erosion
- Failures (by type)
- Fluid dynamics
- Fluid mechanics
- Geology
- Geomaterials
- Geomechanics
- Geotechnical engineering
- Heave
- Hydraulic engineering
- Hydraulic gradients
- Hydraulic properties
- Hydrologic engineering
- Man-made disasters
- Particle size distribution
- Piping erosion
- Soil mechanics
- Soil properties
- Solid mechanics
- Structural mechanics
- Water and water resources
Authors
Affiliations
Hui Tao
Graduate Research Assistant, Dept. of Civil Engineering, Univ. of Akron, ASEC 427F, Akron, OH 44325-3905.
Junliang Tao
Assistant Professor, Dept. of Civil Engineering, Univ. of Akron, ASEC 210, Akron, OH 44325-3905.
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