Dip of the granular shear stress.

Dip of the granular shear stress.
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DOI:
10.1103/physreve.86.061312
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发表时间:
2012-12
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
D. Krimer;Stefan Mahle;Mario Liu
D. Krimer;Stefan Mahle;Mario Liu
中科院分区:
其他
文献类型:
--
作者:
D. Krimer;Stefan Mahle;Mario Liu

文献摘要

相似文献

最近的实验揭示了一个意想不到的倾角的剪切应力的剪切速率的增加,从速率无关的制度,Bagnold流。采用颗粒固体流体动力学,它表明,在均匀的系统中,这样的倾角发生给定的压力或正常的应力,但不为给定的密度。如果剪切速率是强烈不均匀的,强制恒定的体积并不能阻止局部密度的变化,应力下降仍然可能发生。
Recent experiments reveal an unexpected dip of the shear stress as the shear rate increases, from the rate-independent regime to Bagnold flow. Employing granular solid hydrodynamics, it is shown that in uniform systems, such dips occur for given pressure or normal stress, but not for given density. If the shear rate is strongly nonuniform, enforcing a constant volume does not prevent the local density to vary, and a stress dip may still occur.