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arXiv 0803.2199cond-mat.softcond-mat.dis-nn
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强关联粘性液体的密度标度特性

Density scaling as a property of strongly correlating viscous liquids

Thomas B. Schrøder, Ulf R. Pedersen, Jeppe C. Dyre

摘要:

我们解决了最近的一个猜想,根据这个猜想,如果液体是“强相关的”,即,粘性液体的弛豫时间$τ$服从密度标度($τ=F(ρ^γ/T)$,其中$ρ$是密度),在平衡维里和势能波动之间几乎100%相关[Pedersen { \it et al.},PRL { \bf 100},011201(2008)]。两个模型液体-一个不对称哑铃模型和Lewis-Wahnström OTP模型-的计算机模拟证实了这一猜想,并表明标度指数$γ$可以准确地预测从平衡波动。

英文摘要:

We address a recent conjecture according to which the relaxation time $τ$ of a viscous liquid obeys density scaling ($τ=F(ρ^γ/T)$ where $ρ$ is density) if the liquid is ``strongly correlating,'' i.e., has almost 100% correlation between equilibrium virial and potential-energy fluctuations [Pedersen {\it et al.}, PRL {\bf 100}, 011201 (2008)]. Computer simulations of two model liquids - an asymmetric dumbbell model and the Lewis-Wahnström OTP model - confirm the conjecture and demonstrate that the scaling exponent $γ$ can be accurately predicted from equilibrium fluctuations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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