Nanoparticle Transport and Coagulation in Bends of Circular Cross Section Via a New Moment Method

Authors

Jianzhong Lin, Zhejiang UniversityFollow
Peifeng Lin, Zhejiang UniversityFollow
Mingzhou Yu, China Jiliang University
Huajun Chen, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

2-2010

Publication Title

Chinese Journal of Chemical Engineering

Volume

18

Issue

1

First page number:

1

Last page number:

9

Abstract

Transport of nanoparticles and coagulation is simulated with the combination of CFD in a circular bend. The Taylor-expansion moment method (TEMOM) is employed to study dynamics of nanoparticles with Brownian motion, based on the flow field from numerical simulation. A fully developed flow pattern in the present simulation is compared with previous numerical results for validating the model and computational code. It is found that for the simulated particulate flow system, the particle mass concentration, number concentration, particle polydispersity, mean particle diameter and geometric standard deviation over cross-section increase with time. The distribution of particle mass concentration at different time is independent of the initial particle size. More particles are concentrated at outer edge of the bend. Coagulation plays more important role at initial stage than that in the subsequent period. The increase of Reynolds number and initial particle size leads to the increase of particle number concentration. The particle polydispersity, mean particle diameter and geometric standard deviation increase with decreasing Reynolds number and initial particle size.

Keywords

Coagulation; Computational fluid dynamics; Flow in bend; Moment method; Moments method (Statistics); Nanoparticles; Transport; Transport theory

Disciplines

Acoustics, Dynamics, and Controls | Engineering | Fluid Dynamics | Mechanical Engineering | Nanoscience and Nanotechnology

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Lin, J., Lin, P., Yu, M., Chen, H. (2010). Nanoparticle Transport and Coagulation in Bends of Circular Cross Section Via a New Moment Method. Chinese Journal of Chemical Engineering, 18(1), 1-9.