Continuum description of avalanches in granular media.
Continuum description of avalanches in granular media.
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粒状介质中雪崩的连续描述。
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
L. Tsimring
中科院分区：
文献类型：
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作者：
I. Aranson;L. Tsimring
我们开发了部分流化颗粒流的连续描述。我们的理论基于流动的流体动力学方程和顺序参数方程，它描述了颗粒系统的流动和静态成分之间的转变。该理论捕捉了最近在粗糙斜面上的颗粒流实验中观察到的重要现象[A. Daerr 和 S. Douady, Nature (London) 399, 241 (1999)]：层双稳态，以及从以小倾角下坡传播的三角形雪崩到同样以较大角度上坡传播的气球形雪崩的过渡。
We develop a continuum description of partially fluidized granular flows. Our theory is based on the hydrodynamic equation for the flow coupled with the order parameter equation, which describes the transition between flowing and static components of the granular system. This theory captures important phenomenology recently observed in experiments with granular flows on rough inclined planes [A. Daerr and S. Douady, Nature (London) 399, 241 (1999)]: layer bistability, and transition from triangular avalanches propagating downhill at small inclination angles to balloon-shaped avalanches also propagating uphill for larger angles.