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- W2187968936 abstract "Recently, debris-flow kinds of phenomena have been reproduced by means of Lagrangian methods, such as Distinct Element Method (DEM) or Lagrang- ian Finite Element Method (LFEM). Among the oth- ers, meshless, Lagrangian numerical method, known as Smoothed Particle Hydrodynamics (SPH), is here applied to simulate debris-flow initiation and propaga- tion over the slope of a mountain located in the city of Nocera Inferiore (Southern Italy). Debris-flows have been simulated since long time for hazard mitigation assessment or deposit evaluation via Eulerian-based methods. Since they may feature mesh distortion as the computational domain evolves, heavy grid refine- ment algorithms are sometimes necessary, especially for those problems characterized by large deforma- tions. SPH overcomes such difficulties since no mesh is needed over the physical domain. Spatial discretiza- tion is indeed carried out with a collection of parti- cles without connectivity bonds among them. While boundary particles are fixed over time, computing particles are free to move in response of external and internal forces such as gravity and pressure. More in detail, computing particles are all initially frozen. Once a particle located in the upper region of the slope is set free, the others close to it move if a pressure threshold p lim is reached. Other particles are subsequently triggered where the mentioned condition occur, as a domino effect. Runout velocity is control- led by handling the shear stress τ bed with the fixed bed." @default.
- W2187968936 created "2016-06-24" @default.
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- W2187968936 date "2011-01-01" @default.
- W2187968936 modified "2023-09-26" @default.
- W2187968936 title "SIMULATING TRIGGERING AND EVOLUTION OF DEBRIS-FLOWS WITH SPH" @default.
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