JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
Particle Engineering
Investigation of Aggregation Kernel and Simulation of Ultrafine Particle Aggregation under Turbulence and Brownian Motion
Jianxiang ZhengLong WangWenpeng HongShuai XuShan Baolong
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Volume 51 (2018) Issue 1 Pages 62-70

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Abstract

In the present study, the influence of different particle aggregation models on the fly ash particle aggregation process of a turbulence aggregation device has been studied. The influence of an interparticle repulsive potential energy barrier, Umax, on the rate of aggregation was considered, and capture efficiency, f (α), was introduced to correct the ideal turbulence aggregation kernel. The simulation results of an ideal turbulence aggregation model and a corrected turbulence aggregation model were compared to the experimental results, and showed that the error between the ideal turbulence aggregation model and experimental results was approximately 8%; whereas, the error between the corrected turbulence aggregation model and experimental results was only 3%. Brownian aggregation cannot be ignored in the turbulence aggregation of the particles less than 2 µm in diameter. The coupled corrected turbulence aggregation and Brownian aggregation model coincided well with the experimental results.

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© 2018 The Society of Chemical Engineers, Japan
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