Nanoparticle Coagulation in a Planar Jet via Moment Method

YU Ming-zhou; LIN Jian-zhong; CHEN Li-hua

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Article Navigation > Applied Mathematics and Mechanics > 2007 > 28(11): 1287-1295

YU Ming-zhou, LIN Jian-zhong, CHEN Li-hua. Nanoparticle Coagulation in a Planar Jet via Moment Method[J]. Applied Mathematics and Mechanics, 2007, 28(11): 1287-1295.

Citation:

YU Ming-zhou, LIN Jian-zhong, CHEN Li-hua. Nanoparticle Coagulation in a Planar Jet via Moment Method[J]. Applied Mathematics and Mechanics, 2007, 28(11): 1287-1295.

Citation:

YU Ming-zhou, LIN Jian-zhong, CHEN Li-hua. Nanoparticle Coagulation in a Planar Jet via Moment Method[J]. Applied Mathematics and Mechanics, 2007, 28(11): 1287-1295.

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Nanoparticle Coagulation in a Planar Jet via Moment Method

Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 2005-11-01
Rev Recd Date: 2007-07-16
Publish Date: 2007-11-15

Abstract

Abstract

Large eddy simulations of nanoparticle coagulation in an incompressible planar jet were performed. The particle is described using a moment method to approximate the particle general dynamics equations. The time-averaged results based on 3 000 time steps for every case were obtained to explore the influence of the Schmidt number and the Damkohler number on the nanoparticle dynamics. The results show that the changes of Schmidt number have the influence on the number concentration of nanoparticles only when the particle diameter is less than 1nm for the fixed gas parameters. The number concentration of particles for small particles decreases more rapidly along the flow direction, and the nanoparticles with larger Schmidt number have a narrower distribution along the transverse direction. The smaller nanoparticles coagulate and disperse easily, grow rapidly hence show a stronger polydispersity. The smaller coagulation time scale can enhance the particle collision and coagulation. Frequent collision and coagulation bring a great increase in particle size. The larger the Damkohler number, the higher the particle polydispersity.
- nanoparticle,
- coagulation,
- planar jet,
- moment method,
- large eddy simulation

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References(22)

References

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