Continuum modeling of rate-dependent granular flows in SPH

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• 作者：Ryan C. Hurley ; José E. Andrade
• 关键词：Granular media ; Particulate flow ; Smoothed particle hydrodynamics
• 刊名：Computational Particle Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：4
• 期：1
• 页码：119-130
• 全文大小：
• 刊物类别：Theoretical and Applied Mechanics; Computational Science and Engineering; Classical Continuum Physic
• 刊物主题：Theoretical and Applied Mechanics; Computational Science and Engineering; Classical and Continuum Physics;
• 出版者：Springer International Publishing
• ISSN：2196-4386
• 卷排序：4

文摘

We discuss a constitutive law for modeling rate-dependent granular flows that has been implemented in smoothed particle hydrodynamics (SPH). We model granular materials using a viscoplastic constitutive law that produces a Drucker–Prager-like yield condition in the limit of vanishing flow. A friction law for non-steady flows, incorporating rate-dependence and dilation, is derived and implemented within the constitutive law. We compare our SPH simulations with experimental data, demonstrating that they can capture both steady and non-steady dynamic flow behavior, notably including transient column collapse profiles. This technique may therefore be attractive for modeling the time-dependent evolution of natural and industrial flows.