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CFD-DEM Modeling of Dense Sub-Aerial and Submerged Granular Collapses
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DOI：10.3390/w13212969.png)
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Abstract
En 中文
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.
Keywords:
dense granular collapse
sub-arial and submerged granular flow
unresolved CFD-DEM
morphodynamics
volume fraction evolution
Journal
W
IF:
3
Papers:
3.1W
Citations:
7.4W