Two-Phase SPH Modelling of Debris Flows with Considering the Role of Excess Pore-Water on Propagation Stage

Tayyebi Moussavi, Saeid and Pastor Pérez, Manuel Tomás and Martín Stickle, Miguel and Yagüe Hernán, Ángel and Manzanal Milano, Diego Guillermo and Molinos Pérez, Miguel and Mira, P. and Yifru, A.L. and Thakur, V. K. S. (2019). Two-Phase SPH Modelling of Debris Flows with Considering the Role of Excess Pore-Water on Propagation Stage. In: "30th Alliance of Laboratories in Europe for Research and Technology (ALERT) Workshop", 30/09 – 02/10, 2019, Aussois, France. ISBN 978-2-9561359-5-1. pp. 20-22.

Description

Title: Two-Phase SPH Modelling of Debris Flows with Considering the Role of Excess Pore-Water on Propagation Stage
Author/s:
  • Tayyebi Moussavi, Saeid
  • Pastor Pérez, Manuel Tomás
  • Martín Stickle, Miguel
  • Yagüe Hernán, Ángel
  • Manzanal Milano, Diego Guillermo
  • Molinos Pérez, Miguel
  • Mira, P.
  • Yifru, A.L.
  • Thakur, V. K. S.
Item Type: Presentation at Congress or Conference (Poster)
Event Title: 30th Alliance of Laboratories in Europe for Research and Technology (ALERT) Workshop
Event Dates: 30/09 – 02/10, 2019
Event Location: Aussois, France
Title of Book: 30th ALERT Workshop – Poster Session
Date: 2 October 2019
ISBN: 978-2-9561359-5-1
Subjects:
Freetext Keywords: Debris Flow, Pore Water Pressure, Two-Phase
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Matemática e Informática Aplicadas a la Ingenierías Civil y Naval
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The principal objective of this study is to develop mathematical and numerical modelling for simulating two-phase debris flows in which considering the effect of pore water dissipation is essential for risk analysis. A typical debris flow consists of low permeable soil in which lateral spreading is highly affected by pore water pressure. Therefore, a key aspect in order to develop accurate model is to combine propagation and consolidation model in order to consider the effects of pore water pressures in each time-step.In this study, the two-phase model proposed by Pastor et al. (2017) is extended and also an improvement in description of pore pressure evolution is presented. The mathematical approach is based on the mathematical model of Zienkiewicz and Shiomi (1984). Concerning the numerical technique, the Smoothed Particle Hydrodynamics (SPH) is used for problems that are basically in the form of partial differential equations. This study provides a contribution to enhance the two-phase numerical model with adding a 1D finite difference grid to each SPH node in order to improve the description of pore water pressure (SPH-FD Model). The performance of the model is assessed using two benchmark exercises, including 1) flume tests equipped with a (permeable) rack and 2) a real case (Johnsons Landing landslide) for which we have had access to their reliable information. The reasonable results obtained from analysis of the mentioned benchmarks indicated that the propagation-consolidation model is capable to properly reproduce the behaviour of the debris flows, and more importantly to correctly performs the time-space evolution of pore water pressures during the whole propagation stage over an impermeable and permeable bottom boundary.

More information

Item ID: 67216
DC Identifier: https://oa.upm.es/67216/
OAI Identifier: oai:oa.upm.es:67216
Official URL: https://short.upm.es/7xp44
Deposited by: Memoria Investigacion
Deposited on: 25 May 2021 17:26
Last Modified: 25 May 2021 17:26
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