2022/05/24 by Zhiyuan Zhao, Mingcheng Yang, Zhao, Zhiyuan +5 · 2 citations
Computer Science · Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Material Dynamics and Properties #Nonlinear Dynamics and Pattern Formation #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.2205.11881
openalex publication_date 2022/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Prior studies have revealed that nonzero odd viscosity is an essential property for chiral active fluids. Here we report that such an odd viscosity also exists in suspensions of non-active or non-externally-driven but chirally-shaped particles. Computational simulations are carried out for monolayers of dense ratchets in simple shear and planar extensional flows. The contact between two ratchets can be either frictionless or infinitely-frictional, depending on their teeth and sliding directions at the contact point. Our results show that the ratchet suspension has the intermediate shear/extensional viscosity as compared with the suspensions of smooth and gear-like particles. Meanwhile, the ratchet suspensions show nonzero even and odd components of the first normal stress coefficient, which indicates the mixed feature of conventional complex fluids and chiral viscous fluids.