Anomalous crystalline ordering of particles in a viscoelastic fluid under high shear.

ABSTRACT: Addition of particles to a viscoelastic suspension dramatically alters the properties of the mixture, particularly when it is sheared or otherwise processed. Shear-induced stretching of the polymers results in elastic stress that causes a substantial increase in measured viscosity with increasing shear, and an attractive interaction between particles, leading to their chaining. At even higher shear rates, the flow becomes unstable, even in the absence of particles. This instability makes it very difficult to determine the properties of a particle suspension. Here, we use a fully immersed parallel plate geometry to measure the high-shear-rate behavior of a suspension of particles in a viscoelastic fluid. We find an unexpected separation of the particles within the suspension resulting in th

SUBMITTER: Sun S 

PROVIDER: S-EPMC10556622 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature