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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 8 - CLIMATE CHANGE AND HAZARD MITIGATION : An ISPH Model for the Dynamics of Dry Granular Assemblies
An ISPH Model for the Dynamics of Dry Granular Assemblies
Author : Xuzhen He and Dongfang Liang
Debris flows are a catastrophic geophysical phenomenon, which may cause huge fatality and property loss. Thus, it is of vital importance to understand the behaviour of debris flows. They behave more like a ?frictional material? like dry granular materials when the portion of solid is much greater than that of water. This paper provides an application of the incompressible SPH method to the dynamics of the dry granular assemblies, which is modelled by a pressure dependent Bingham model. In this constitutive model, not only is the yield shear stress of granular materials dependent on local pressure, the viscosity is also dependent on pressure. On the whole, numerical results agree well with experiments. The SPH method reproduced many important features of granular collapse, including the final deposit profile, ceasing time and kinematic properties of the granular column.
File Size : 507,092 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 20/07/2016
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