Direct expansion method of moments for nanoparticle Brownian coagulation in the entire size regime

被引：12
|
作者：
Chen, Zhongli [1 ]
Lin, Jianzhong [1 ,2 ]
Yu, Mingzhou [2 ,3 ]
机构：
[1] Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou 310027, Zhejiang, Peoples R China
[2] China Jiliang Univ, Hangzhou 310018, Zhejiang, Peoples R China
[3] Karlsruhe Inst Technol, Inst Mech Proc Engn & Mech, D-76021 Karlsruhe, Germany
来源：
JOURNAL OF AEROSOL SCIENCE | 2014年 / 67卷
基金：
国家自然科学基金重大项目;
关键词：
Brownian particles; Coagulation; Entire size regime; Method of moments; Accuracy; AEROSOL DYNAMICS; QUADRATURE; EQUATION; SIMULATION; PARTICLES; KERNEL; MOTION; RANGE;
D O I：
10.1016/j.jaerosci.2013.08.011
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The direct expansion method of moments for nanoparticle Brownian coagulation is investigated in the entire size regime. The exact Dahneke's formula is used as the coagulation kernel. After comparing the results predicted by the direct expansion method of moments with those provided by the quadrature method of moments, the direct expansion method is proved to be qualified for predicting the time evolution of the lower order moments such as the zeroth and second moments. For relatively small initial geometric standard deviation, the results predicted by the direction expansion method of moments are more accurate than those provided by the quadrature method of moments. The partial derivatives of the coagulation kernel that appear in the direction expansion method of moments are calculated numerically due to the complicated form of the selected kernel, and the computational time can be reduced by means of parallel computing. (C) 2013 Published by Elsevier Ltd.
引用
收藏
页码：28 / 37
页数：10
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