Cherepanov Ivan, Smorodin Boris
Department of Radio Electronics and Information Security, Perm State University, 15 Bukirev Street, Perm, Russia, 614990.
Department of Physics of Phase Transitions, Perm State University, 15 Bukirev Street, Perm, Russia, 614990.
Eur Phys J E Soft Matter. 2022 Apr 25;45(4):39. doi: 10.1140/epje/s10189-022-00192-4.
Two-dimensional oscillatory flows in the convective cell filled with a colloidal suspension are investigated. We consider transient and permanent evolution scenarios of the traveling wave that were found in experimental investigation (Donzelli et al. in Phys Rev Lett 102:104503, 2009). The nanoparticle transport mechanisms (thermodiffusion and gravity settling) are analyzed and elucidated with the help of finite-difference numerical simulations for Hyflon MFA colloidal suspension. The spatiotemporal characteristics of the stable (permanent) traveling waves are determined. The dependence of the Rayleigh number on the Lewis number at the boundary of existence of the stable traveling wave is obtained.
研究了充满胶体悬浮液的对流单元中的二维振荡流。我们考虑了在实验研究中发现的行波的瞬态和稳态演化情形（Donzelli等人，《物理评论快报》，102:104503，2009年）。借助于对Hyflon MFA胶体悬浮液的有限差分数值模拟，分析并阐明了纳米颗粒的传输机制（热扩散和重力沉降）。确定了稳定（稳态）行波的时空特性。得到了稳定行波存在边界处瑞利数与刘易斯数的关系。
