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arXiv 1402.3443cond-mat.stat-mechcond-mat.mtrl-scicond-mat.softphysics.chem-ph
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一种简单有效的多分散硬球堵塞率估算准则

A simple effective rule to estimate the jamming packing fraction of polydisperse hard spheres

Andrés Santos, Santos B. Yuste, Mariano López de Haro, Gerardo Odriozola, Vitaliy Ogarko

摘要:

最近的一个建议,其中的状态方程的多分散硬球混合物映射到单组分流体的状态方程外推超过凝固点,以估计堵塞填充分数$ϕ_\text{J}$的多分散系统作为一个简单的功能$M_1M_3/M_2^2$,其中$M_k$是$k$ th时刻的大小分布。对大量不同混合物的$ϕ_\text{J}$的实验和模拟数据的分析表明,与理论估计值有显著的一致性。为了给该过程提供额外的支持,在高密度区的17个混合物的模拟数据被用来推断纯硬球系统在亚稳区的状态方程。一个很好的崩溃的推断曲线的玻璃化转变和一个显着缩小的不同的平衡玻璃分支的所有方式堵塞观察。因此,本方法提供了一个极其简单的标准,可以统一到一个通用框架中,并使来自非常不同的多分散硬球混合物的数据具有一致性。

英文摘要:

A recent proposal in which the equation of state of a polydisperse hard-sphere mixture is mapped onto that of the one-component fluid is extrapolated beyond the freezing point to estimate the jamming packing fraction $ϕ_\text{J}$ of the polydisperse system as a simple function of $M_1M_3/M_2^2$, where $M_k$ is the $k$th moment of the size distribution. An analysis of experimental and simulation data of $ϕ_\text{J}$ for a large number of different mixtures shows a remarkable general agreement with the theoretical estimate. To give extra support to the procedure, simulation data for seventeen mixtures in the high-density region are used to infer the equation of state of the pure hard-sphere system in the metastable region. An excellent collapse of the inferred curves up to the glass transition and a significant narrowing of the different out-of-equilibrium glass branches all the way to jamming are observed. Thus, the present approach provides an extremely simple criterion to unify in a common framework and to give coherence to data coming from very different polydisperse hard-sphere mixtures.

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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