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arXiv 1206.2835cond-mat.soft
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颗粒力学物理

The Physics of Granular Mechanics

Yimin Jiang, Mario Liu

摘要:

回顾和阐明了{ \em流体力学}方法对颗粒行为的连续力学描述。通过同时考虑能量和动量守恒,{ \em流体力学}的一般形式提供了一种系统的方法来{推导}本构关系的结构,包括非均匀系统所需的所有梯度项。一个重要的输入,以达到不同的关系(例如,牛顿流体,固体和颗粒介质)是能量,特别是其变量的数量和类型。从一个仔细检查的物理基础颗粒的行为,我们确定的独立变量,并提出了一个简单的和定性适当的颗粒能量的表达式。提出了所得的流体动力学理论,特别是本构关系,并进行了初步验证。

英文摘要:

The {\em hydrodynamic} approach to a continuum mechanical description of granular behavior is reviewed and elucidated. By considering energy and momentum conservation simultaneously, the general formalism of {\em hydrodynamics} provides a systematic method to {derive} the structure of constitutive relations, including all gradient terms needed for nonuniform systems. An important input to arrive at different relations (say, for Newtonian fluid, solid and granular medium) is the energy, especially the number and types of its variables. Starting from a careful examination of the physics underlying granular behavior, we identify the independent variables and suggest a simple and qualitatively appropriate expression for the granular energy. The resultant hydrodynamic theory, especially the constitutive relation, is presented and given preliminary validation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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