Institute of Physics, University of Amsterdam, Science Park 904, 1018 XH Amsterdam, Netherlands.
Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands.
Phys Rev Lett. 2018 Nov 30;121(22):228001. doi: 10.1103/PhysRevLett.121.228001.
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.
无规热无序和热动无序系统中分散均匀颗粒的非牛顿流动行为具有惊人的相似特征。通过研究具有不同体积分数、颗粒大小和相互作用的屈服应力流体和胶体玻璃的流动曲线，我们表明，热和非热系统分别表现出与玻璃和堵塞点的幂律标度，具有相同的指数。所有屈服应力流动曲线都可以使用拉普拉斯压力作为非热系统的应力标度，渗透压作为热系统的应力标度，缩放到单个通用曲线上。引人注目的是，颗粒间相互作用的细节对于重新缩放并不重要，表明它们类似于相同普适类的通常的相变。这种缩放允许我们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。
