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Article

CFD-DEM Modeling of Dense Sub-Aerial and Submerged Granular Collapses

1
Department of Civil, Geological and Mining Engineering, Polytechnique Montreal, P.O. Box 6079, Stn Centre-Ville, Montréal, QC H3C 3A7, Canada
2
Research Unit for Industrial Flow Processes (URPEI), Department of Chemical Engineering, Polytechnique Montreal, P.O. Box 6079, Stn Centre-Ville, Montréal, QC H3C 3A7, Canada
3
Canada Research Chair (CRC) in Computational Hydrosystems, Polytechnique Montreal, P.O. Box 6079, Stn Centre-Ville, Montréal, QC H3C 3A7, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Armando Carravetta
Water 2021, 13(21), 2969; https://doi.org/10.3390/w13212969
Received: 2 October 2021 / Revised: 16 October 2021 / Accepted: 16 October 2021 / Published: 21 October 2021
(This article belongs to the Special Issue Computational Fluid Mechanics and Hydraulics)
Sub-aerial (dry) and submerged dense granular collapses are studied by means of a three-phase unresolved computational fluid dynamics-discrete element method (CFD-DEM) numerical model. Physical experiments are also performed to provide data for validation and further analysis. Validations show good compatibility between the numerical and experimental results. Collapse mechanism as well as post-collapse morphological parameters, such as granular surface profile and runout distance, are analyzed. The spatiotemporal variation of solid volume fraction is also investigated. The effect granular column aspect ratio is studied and found to be a key factor in granular morphology for both submerged and dry conditions. The volume fraction analysis evolution shows an expansion and re-compaction trend, correlated with the granular movement. View Full-Text
Keywords: dense granular collapse; sub-arial and submerged granular flow; unresolved CFD-DEM; morphodynamics; volume fraction evolution dense granular collapse; sub-arial and submerged granular flow; unresolved CFD-DEM; morphodynamics; volume fraction evolution
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MDPI and ACS Style

Shademani, M.; Blais, B.; Shakibaeinia, A. CFD-DEM Modeling of Dense Sub-Aerial and Submerged Granular Collapses. Water 2021, 13, 2969. https://doi.org/10.3390/w13212969

AMA Style

Shademani M, Blais B, Shakibaeinia A. CFD-DEM Modeling of Dense Sub-Aerial and Submerged Granular Collapses. Water. 2021; 13(21):2969. https://doi.org/10.3390/w13212969

Chicago/Turabian Style

Shademani, Maryam, Bruno Blais, and Ahmad Shakibaeinia. 2021. "CFD-DEM Modeling of Dense Sub-Aerial and Submerged Granular Collapses" Water 13, no. 21: 2969. https://doi.org/10.3390/w13212969

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