Memory-induced motion reversal in Brownian liquids.
Memory-induced motion reversal in Brownian liquids.
复制标题
布朗液体中记忆引起的运动逆转
DOI:
10.1039/c9sm02005e
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发表时间:
2020
期刊:
影响因子:
3.4
通讯作者:
Matthias Schmidt
中科院分区:
文献类型:
--
作者:
Lucas L. Treffenstädt;Matthias Schmidt
We study the Brownian dynamics of hard spheres under spatially inhomogeneous shear, using event-driven Brownian dynamics simulations and power functional theory. We examine density and current profiles both for steady states and for the transient dynamics after switching on and switching off an external square wave shear force field. We find that a dense hard sphere fluid (volume fraction ≈0.35) undergoes global motion reversal after switching off the shear force field. We use power functional theory with a spatially nonlocal memory kernel to describe the superadiabatic force contributions and obtain good quantitative agreement of the theoretical results with simulation data. The theory provides an explanation for the motion reversal: internal superadiabatic nonequilibrium forces that oppose the externally driven current arise due to memory after switching off. The effect is genuinely viscoelastic: in steady state, viscous forces oppose the current, but they elastically generate an opposing current after switch-off.
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DOI:
10.1209/0295-5075/102/28011
发表时间:
2013
期刊:
Europhysics Letters
影响因子:
--
作者:
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DOI:
10.1063/1.4935967
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期刊:
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期刊:
Journal of Physics: Condensed Matter
影响因子:
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作者:
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DOI:
10.1103/physreve.94.052603
发表时间:
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期刊:
Physical review. E
影响因子:
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作者:
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DOI:
10.1063/1.5019447
发表时间:
2018
期刊:
The Journal of chemical physics
影响因子:
--
作者:
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通讯作者:
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