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Numerical Modeling of a Granular Collapse Immersed in a Viscous Fluid

Izard, Edouard and Lacaze, Laurent and Bonometti, Thomas and Pedrono, Annaig Numerical Modeling of a Granular Collapse Immersed in a Viscous Fluid. (2018) In: Advances in Hydroinformatics SimHydro 2017 : Choosing The Right Model in Applied Hydraulics. Springer Nature Singapore, 1099-1116. ISBN 978-981-10-7218-5

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Official URL: https://doi.org/10.1007/978-981-10-7218-5_76

Abstract

The three-dimensional unsteady collapse of the granular column in a viscous fluid has been investigated with an IBM/DEM approach. Present numerical simulations allow one to confirm quantitatively several experimental observations of Rondon et al. regarding morphology, characteristic sizes of granular deposits and the basal pressure below the column. In the presented simulations, the collapse dynamics is controlled by the viscous time Tv. To our knowledge, a numerical approach, e.g. the IBM/DEM method, is able for the first time to capture the pore pressure feedback phenomenon in flowing fluid-grains mixture. The effect of the initial packing fraction has a great influence of the dynamics of granular collapse in the simulation results as in the experiments of Rondon et al. Furthermore, the IBM/DEM permits to investigate the inner state of the granular column during the collapse, in particular, the evolution of the pressure field inside the granular column can be analyzed which is difficult to do in experiments. Simulations of the collapse of a granular column immersed in a fluid can be performed in the inertial and free-fall regimes as well varying the nature of the fluid and/or the particles.

Item Type:Book Section
Audience (journal):International peer-reviewed journal
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Arcelor Mittal Research (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Thomas BONOMETTI
Deposited On:28 Nov 2018 10:39

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