Effective confinement as origin of the equivalence of kinetic temperature and fluctuation-dissipation ratio in a dense shear-driven suspension.
Effective confinement as origin of the equivalence of kinetic temperature and fluctuation-dissipation ratio in a dense shear-driven suspension.
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有效约束是稠密剪切驱动悬浮液中动力学温度和波动耗散比等价的起源
DOI:
10.1103/physreve.85.021103
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
T. Speck
中科院分区:
文献类型:
--
作者:
B. Lander;U. Seifert;T. Speck
We study response and velocity autocorrelation functions for a tagged particle in a shear driven suspension governed by underdamped stochastic dynamics. We follow the idea of an effective confinement in dense suspensions and exploit a time scale separation between particle reorganization and vibrational motion. This allows us to approximately derive the fluctuation-dissipation theorem in a “hybrid” form involving the kinetic temperature as an effective temperatureandan additive correction term. We show numerically that even in a moderately dense suspension the latter is negligible. We discuss similarities and differences with a simple toy model, a single trapped particle in shear flow.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Boris Lander;Udo Seifert;Thomas Speck
通讯作者:
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发表时间:
2009
期刊:
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通讯作者:
M. Fuchs
DOI:
--
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2006
期刊:
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