Sensitivity to solid volume fraction of gravitational instability in a granular medium

Felix Bonnet; Thierry Richard; Pierre Philippe

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Sensitivity to solid volume fraction of gravitational instability in a granular medium

机译：颗粒介质中对重力失稳的固体体积分数的敏感性

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We report experimental results on incipient dynamics of gravitational destabilization in an immersed granular medium. Two protocols have been used to reach instability: a progressive loading and a dam-break situation. The instability triggering, analyzed by high-speed imaging and CIV post-processing, reveals distinct dynamical behaviours depending on the initial packing fraction of the medium. Two destabilisation modes have been observed: a surface avalanche and a deeper phenomenon that we called circular collapse.

机译：我们报告了沉浸颗粒介质中重力失稳的初期动力学的实验结果。已经使用两种协议来达到不稳定：渐进式加载和溃坝情况。通过高速成像和CIV后处理进行的不稳定性触发，揭示了取决于介质初始填充分数的独特动力学行为。已经观察到两种去稳定模式：表面雪崩和更深的现象，我们称其为圆形塌陷。

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来源
《Granular matter》 |2010年第3期|p.317-325|共9页
作者
Felix Bonnet; Thierry Richard; Pierre Philippe;
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作者单位

Cemagref, Aix en Provence, Unite OHAX, 3275 Route de Cezanne, 13182 Aix en Provence Cedex 5, France;

Cemagref, Aix en Provence, Unite OHAX, 3275 Route de Cezanne, 13182 Aix en Provence Cedex 5, France;

Cemagref, Aix en Provence, Unite OHAX, 3275 Route de Cezanne, 13182 Aix en Provence Cedex 5, France;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
gravitational instability; avalanche; collapse; granular flows;

机译：重力不稳定雪崩;坍方;细流;

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1. Analysis of the Granular Structures of Aggregates Using Solid Volume Measurement of Elementary Fractions [J] . Andre Lecomte, Jean-Michel Mechling Cement, Concrete, and Aggregates . 2001,第2期

机译：使用基本组分的固体体积测量分析骨料的颗粒结构
2. Effects of Platelet Size and Mean Volume Fraction on Platelet Orientation and Volume Fraction Distributions in Functionally Graded Material Fabricated by a Centrifugal Solid-Particle Method [J] . P. D. Sequeira, Yoshimi Watanabe, Hiroyuki Eryu, Journal of engineering materials and technology . 2007,第2期

机译：离心固体颗粒法制备的功能梯度材料中血小板大小和平均体积分数对血小板取向和体积分数分布的影响
3. GRAVITATIONAL INSTABILITY OF SOLIDS ASSISTED BY GAS DRAG: SLOWING BY TURBULENT MASS DIFFUSIVITY [J] . Karim Shariff, Jeffrey N. Cuzzi The Astrophysical journal . 2011,第1期

机译：气体引起的固体重力失稳：由于湍流质量扩散而减慢
4. Gravitational Instability of a Granular Medium Subjectedto an Inner Water Flow [C] . Philippe P., Bonnet F, Richard T. International Conference on Micromechanics of Granular Media . 2009

机译：粒状介质的引力不稳定性受到内部水流的
5. Predicting the onset of transient gas pressures and flow rate instabilities for contact bed flow of a granular solid in a sloping standpipe. [D] . Johanson, Kerry Dee. 1994

机译：预测倾斜立管中粒状固体的接触床流的瞬时气体压力和流速不稳定性的发生。
6. Gravitational instabilities in binary granular materials [O] . Christopher P. McLaren, Thomas M. Kovar, Alexander Penn, 2019

机译：二元颗粒材料的引力不稳定性
7. Sensitivity to solid volume fraction of gravitational instability in a granular medium [O] . Bonnet, Fabrice, Richard, T., Philippe, P. 2010

机译：颗粒介质中对重力失稳的固体体积分数的敏感性
8. Gravitational Instability in an Infinite Homogeneous Medium [R] . Nariai, H. 1986

机译：无限齐次介质中的引力不稳定性

Sensitivity to solid volume fraction of gravitational instability in a granular medium

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