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arXiv 2202.10641cond-mat.softphysics.flu-dyn
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稠密颗粒悬浮体中的粘滞-惯性转变

Viscous-inertial transition in dense granular suspension

Franco Tapia, Mie Ichihara, Olivier Pouliquen, Élisabeth Guazzelli

摘要:

当惯性增加时,颗粒悬浮液呈现从斯托克斯极限中的牛顿流变学到Bagnoldian流变学的转变。可以在压力或体积施加模式下运行的定制流变仪用于检查接近堵塞的致密状态下的这种转变。通过改变系统的间隙液,剪切速率,和包装分数在体积施加的测量,我们表明,过渡发生在斯托克斯数为10独立的包装分数。使用压力施加流变仪,我们调查是否可以统一的惯性和粘性制度作为一个单一的无量纲数的函数的基础上应力加和性。

英文摘要:

Granular suspensions present a transition from a Newtonian rheology in the Stokes limit to a Bagnoldian rheology when inertia is increased. A custom rheometer which can be run in a pressure or a volume-imposed mode is used to examine this transition in the dense regime close to jamming. By varying systematically the interstitial fluid, shear rate, and packing fraction in volume-imposed measurements, we show that the transition takes place at a Stokes number of 10 independent of the packing fraction. Using pressure-imposed rheometry, we investigate whether the inertial and viscous regimes can be unified as a function of a single dimensionless number based on stress additivity.

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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