DIFFUSION OF FRACTAL AGGREGATES IN THE FREE MOLECULAR REGIME

被引：41

作者：

CAI, J

SORENSEN, CM

机构：

[1] Department of Physics, Kansas State University, Manhattan

来源：

PHYSICAL REVIEW E | 1994年 / 50卷 / 05期

关键词：

D O I：

10.1103/PhysRevE.50.3397

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We use static and dynamic light scattering to determine how the diffusion coefficient of a fractal aggregate in the free molecular regime depends on its morphological properties. Our system is a carbonaceous flame soot aerosol containing fractal aggregates with Df=1.8. We find that the Epstein equation for the diffusion coefficient holds with an effective mobility radius given by Rm=0.99aN0.43, where N is the number of monomers per aggregate and a is the monomer radius. This result is quantitatively explained as due to the projectional area of the aggregate which includes monomer-monomer screening. © 1994 The American Physical Society.

引用

页码：3397 / 3400

页数：4

共 33 条

[1] COMPARISON OF SIZE AND MORPHOLOGY OF SOOT AGGREGATES AS DETERMINED BY LIGHT-SCATTERING AND ELECTRON-MICROSCOPE ANALYSIS [J].