CFD-DEM Simulation of Some Riprap Slopes

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.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 457-468
  • Monograph Title: Geo-Congress 2023: Geotechnics of Natural Hazards

Subject/Index Terms

Filing Info

  • Accession Number: 01897525
  • Record Type: Publication
  • ISBN: 9780784484654
  • Files: TRIS, ASCE
  • Created Date: Oct 25 2023 5:00PM