著者

齊藤 国靖

出版者

公益社団法人 日本表面真空学会

雑誌

表面と真空 (ISSN:24335835)

巻号頁・発行日

vol.66, no.3, pp.170-175, 2023-03-10 (Released:2023-03-10)

参考文献数

10

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We study non-local effects on inhomogeneous flows of soft athermal particles near the jamming transition. We employ molecular dynamics simulations to demonstrate Kolmogorov flows, where a sinusoidal flow profile with fixed wave number is externally imposed, resulting in a spatially inhomogeneous shear rate. We find that the rheology of soft athermal particles is strongly wave number-dependent and particle migration is not sufficient to explain the resulting stress profiles within conventional local constitutive relations. We show that stress profiles can be described by non-local constitutive relations that account for gradients to fourth order.