CFD-DEM Simulation of Some Riprap Slopes
Publication: Geo-Congress 2023
ABSTRACT
Riprap is commonly used to prevent erosion around different hydraulic structures such as riverbanks, shorelines, streambeds, bridge piers and abutments, and dams. When riprap is installed on the riverbanks, its stability is affected by the stream flow, slope angle, and material properties of the riprap elements. The magnitude of the slope angle affects the critical velocity and critical shear stress of the riprap rocks, which could endanger the stability of the riprap and cause the failure of the riprap layer. In recent years, a combination of computational fluid dynamics with the discrete element method, CFD-DEM, has proven its efficiency in the simulation of micro behavior of erosion around different hydraulic structures. In this research, using this tool, multiple numerical simulations are performed to study the effect of the slope angle on the critical velocity of individual riprap rocks. The effect of other parameters such as angularity of the rock elements is also studied. Results of the numerical simulations are summarized in a chart that shows the critical velocity and critical shear stress of individual riprap elements as a function of the slope angle.
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Information & Authors
Information
Published In
Geo-Congress 2023
Pages: 457 - 468
History
Published online: Mar 23, 2023
ASCE Technical Topics:
- Coastal engineering
- Coasts, oceans, ports, and waterways engineering
- Computational fluid dynamics technique
- Engineering fundamentals
- Fluid dynamics
- Fluid mechanics
- Geology
- Geomechanics
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic structures
- Hydrologic engineering
- Material mechanics
- Material properties
- Materials engineering
- Models (by type)
- Numerical models
- Riprap
- Rocks
- Shear stress
- Shores
- Slopes
- Stress (by type)
- Structural analysis
- Structural engineering
- Water and water resources
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