Fluid depletion in shear bands.
Fluid depletion in shear bands.
复制标题
剪切带中的流体耗尽。
DOI：
10.1103/physrevlett.109.248001
复制
发表时间：
2012
影响因子：
8.6
通讯作者：
H. Herrmann
中科院分区：
文献类型：
--
作者：
Roman Mani;D. Kadau;D. Or;H. Herrmann
湿颗粒介质中剪切带内孔隙液体是如何重构的？传统观点认为，液体会被吸入膨胀的颗粒状介质中。然而，我们发现，尽管增加了孔隙度，由于剪切带中的液体耗尽。这个明显的悖论是解决了在低液含量引起的断裂和重新配置的个别液桥的液体传输的微尺度模型。测得的液体含量曲线显示出类似于数值模拟结果的宏观耗尽带。我们推导出一个修正的扩散描述破裂引起的液体迁移。
How does pore liquid reconfigure within shear bands in wet granular media? Conventional wisdom predicts that liquid is drawn into dilating granular media. We, however, find a depletion of liquid in shear bands despite increased porosity due to dilatancy. This apparent paradox is resolved by a microscale model for liquid transport at low liquid contents induced by rupture and reconfiguration of individual liquid bridges. Measured liquid content profiles show macroscopic depletion bands similar to results of numerical simulations. We derive a modified diffusion description for rupture-induced liquid migration.