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多分散球体随机堆积的几何与传输特性

Geometrical and transport properties of random packings of polydisperse spheres.

作者信息

Mourzenko V, Thovert J-F, Vizika O, Adler P M

机构信息

LCD, SP2MI, Boîte Postale 30179, 86962 Futuroscope Cedex, France.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Jun;77(6 Pt 2):066306. doi: 10.1103/PhysRevE.77.066306. Epub 2008 Jun 11.

Abstract

Loose packings of spheres with bidisperse or log-normal distributions are generated by random sequential deposition. Porosity, conductivity, and permeability are determined. The porosities correspond to loose packings, but they follow the usual trends for bidisperse packings. The conductivity and permeability follow power laws as functions of the porosity of the packings. Several other quantities such as the classical Kozeny constant are successfully represented as functions of porosity. Some dimensionless representations gather the numerical data on curves valid for all particle distributions. Finally, comparisons with experimental data are satisfactory.

摘要

通过随机顺序沉积生成具有双分散或对数正态分布的球体松散堆积。测定了孔隙率、电导率和渗透率。孔隙率对应于松散堆积,但它们遵循双分散堆积的常见趋势。电导率和渗透率遵循幂律,是堆积孔隙率的函数。其他几个量,如经典的科曾尼常数,也成功地表示为孔隙率的函数。一些无量纲表示将所有颗粒分布有效的数值数据收集在曲线上。最后,与实验数据的比较结果令人满意。

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