论文标题
密集颗粒悬浮液的粘性惯性过渡
Viscous-inertial transition in dense granular suspension
论文作者
论文摘要
颗粒状悬浮液表明，当惯性增加时，从牛顿流变学中的牛顿流变学限制为bagnoldian的流变学。可以在压力或体积施加模式下运行的自定义流变仪用于检查接近堵塞的密集体制中的这种过渡。通过系统地改变体积测量的间隙流体，剪切速率和填充分数，我们表明过渡以10个独立于包装分数的stokes数量进行。使用压力施加的流变计，我们研究了惯性和粘性状态是否可以根据应力加性而统一为单个无量纲数的函数。
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.
