Crossover between Athermal Jamming and the Thermal Glass Transition of Suspensions
Crossover between Athermal Jamming and the Thermal Glass Transition of Suspensions
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DOI：
10.1103/physrevlett.121.228001
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发表时间：
2018-11-28
影响因子：
8.6
通讯作者：
Bonn, D.
中科院分区：
文献类型：
--
作者：
Dinkgreve, M.;Michels, M. A. J.;Bonn, D.
在高密度下，均匀分散颗粒的热无序体系和非热无序体系的非牛顿流动行为具有惊人的相似特征。通过研究屈服应力流体和胶体玻璃具有不同的体积分数，粒径和相互作用的流动曲线，我们表明，热和非热系统表现出幂律缩放相对于玻璃和堵塞点，分别具有相同的指数。所有的屈服-应力流动曲线都可以换算成一条通用曲线，对于非热系统，用拉普拉斯压力作为应力标度，对于热系统，用渗透压作为应力标度。引人注目的是，粒子间相互作用的细节对重新标度并不重要，这表明它们类似于相同普适类的通常相变。重新缩放使我们能够从体积分数和已知的材料特性来预测这些系统的流动特性。
The non-Newtonian flow behavior of thermal and athermal disordered systems of dispersed uniform particles at high densities have strikingly similar features. By investigating the flow curves of yield-stress fluids and colloidal glasses having different volume fractions, particle sizes, and interactions, we show that both thermal and athermal systems exhibit power-law scaling with respect to the glass and jamming point, respectively, with the same exponents. All yield-stress flow curves can be scaled onto a single universal curve using the Laplace pressure as the stress scale for athermal systems and the osmotic pressure for the thermal systems. Strikingly, the details of interparticle interactions do not matter for the rescaling, showing that they are akin to usual phase transitions of the same universality class. The rescaling allows us to predict the flow properties of these systems from the volume fraction and known material properties.