SPH-DEM model for free-surface flows containing solids applied to river ice jams

D.M. Robb, J. Marongiu, S.J. Gaskin
Taylor & Francis
Journal of Hydraulic Research
Discrete element method, ice streams, Open-Channel Flow, river ice jams, smoothed particle hydrodynamics models

A meshless method is used to simulate free-surface fluid flows containing solid particles, motivated by the need to simulate river ice dynamics problems. A smoothed particle hydrodynamics model (SPH), with an arbitrary Lagrangian–Eulerian formulation for the fluid phase, is two-way coupled with the discrete element method (DEM) for the solid phase. Validation test cases include a bouncing sphere on a level surface, a collapse of a granular column, wedge entry into still water and solids of different densities falling into still water. The computed results using the SPH-DEM model agree quantitatively with the expected behaviour in the test cases. Numerical convergence is demonstrated for the wedge entry validation case. The SPH-DEM model is then used to simulate the stability of floating ice blocks approaching a stationary cover and ice accumulation upstream of an obstruction. The results show promise to serve as a useful quantitative engineering tool.

Keywords: Discrete element method, ice streams, open channel flow, river ice jams, smoothed particle hydrodynamics models

Access Full Text