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Modelling Tsunami-Generated Debris Flow in Urban Environments

Author(s): Ricardo B. Canelas, Daniel Conde, Orlando Garcia Feal, Rui M. L. Ferreira

Linked Author(s): Rui M.L. Ferreira

Keywords: Tsunami, urban debris, dual SPHysics, STAV2D

Abstract: Tsunamis incorporate solids as they propagate in urban environments. Two-dimensional (2D) models have been used to assess its propagation even in dense urban fronts. The objective of this work is to introduce computational advances in tsunami modeling in urban areas. These include a fully lagrangian, three-dimensional (3D) description of the fluid-solid flow, coupled with a high performance mesh less implementation, capable of dealing with large domains and fine discretizations. A Smoothed Particle Hydrodynamics (SPH) Navier Stokes discretization and a Distributed Contact Discrete Element Method (DCDEM) description of solid-solid interactions provide state-of the-art fluid-solid flow descriptions. High resolution simulations of a city section in Lisbon downtown are presented. It is shown that the incoming wave is able to mobilize and incorporate standing vehicles and other urban hardware. Such fully detailed (3D) simulation provides explicit description of the interactions among fluid, floating debris, the buildings and the pavement. The proposed model presents both an interesting research tool for the study of these flows and an innovative tool for civil protection authorities to design and test mitigation solutions


Year: 2017

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