We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Two-dimensional Dynamics Simulation of Two-phase Debris Flow.
- Authors
LIU, Wei; HE, Siming; OUYANG, Chaojun
- Abstract
To investigate the movement mechanism of debris flow, a two-dimensional, two-phase, depth-integrated model is introduced. The model uses Mohr-Coulomb plasticity for the solid rheology, and the fluid stress is modeled as a Newtonian fluid. The interaction between solid and liquid phases, which plays a major role in debris flow movement, is assumed to consist of drag and buoyancy forces. The applicability of drag force formulas is discussed. Considering the complex interaction between debris flow and the bed surface, a combined friction boundary condition is imposed on the bottom, and this is also discussed. To solve the complex model equations, a numerical method with second-order accuracy based on the finite volume method is proposed. Several numerical experiments are performed to verify the feasibilities of model and numerical schemes. Numerical results demonstrate that different solid volume fractions substantially affect debris flow movement.
- Subjects
DEBRIS avalanches; COMPUTER simulation; FRICTIONAL resistance (Hydrodynamics); DRAG force; TWO-phase flow
- Publication
Acta Geologica Sinica (English Edition), 2017, Vol 91, Issue 5, p1873
- ISSN
1000-9515
- Publication type
Article
- DOI
10.1111/1755-6724.13416