The Influence of Friction Coefficient of Particles on Numerical Simulations by the Coupled Discrete Element-Fluid Dynamics on Morphology of Density Flows

Sérgio Antônio, Brum Junior, Araújo Fábio, Pereira, Sérgio Tibana, Fernando Saboya, Albuquerque Júnior
The happening of landslides in seabed is a phenomenon that occurs on several oceanic environments. These phenomena have caused damage and destruction of offshore structures. To try understanding a bit more these phenomena the present work used a free tool in which landslides could be simulated trough DEM coupled to computational fluid dynamics. The used software in simulations was CFDEMcoupling. Through this software onshore and offshore landslides were simulated, assuming a 6° slope. To each
more » ... 6° slope. To each simulation performed a different particle coefficient of friction was used and the variations on average height and outflow were assessed. The data show a trend of growth in maximum average height of outflow in regions near of the beginning of movement and the decrease of this height in regions farther from the beginning of outflow as the coefficient of friction of particles increases. These behaviors occur in onshore as far as offshore flows, the maximum average heights with the same coefficient of friction in particles are close if the values between onshore and offshore flows are compared.