光聚 Rayleigh 粒子射流

doi:10.12066/j.issn.1007-2861.1954

Abstract

Abstract:

Dynamic convergence and stability characteristics of Rayleigh particle jets under laser irradiation are studied. Laser technology has widely applications in particle operation at micro-nano scales such as optical tweezers. While researches of particle behavior under laser irradiation generally focus on optical mapping and measurement of the particle population characteristics, laser-induced particle dynamical behaviors are rarely studied. Based on the analysis of granular gas dynamic simulation and the flow instability theory, the two cases of rarefied granular jet (point source) and granular jet are investigated. For point sources, that laser is effective in making the particle distribution more concentrated in the space by comparing with the classical vacuum deposition theory is found. In the case of granular jet, simulation and theoretical analysis show that the light scattering force can suppress instability of the long and short wavelengths, and effectively gather nanoparticles into jet.

Key words: optical tweezers, Rayleigh particle, granular jets, granular kinetics, flow-stability

CLC Number:

O358

Zhenyu NIU, Zhewei ZHOU, Kai HUANG, Jinsong ZHANG, Jianhua ZHANG, Zhiliang WANG. Laser-induced aggregation of Rayleigh granular jets[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(5): 754-766.

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Laser-induced aggregation of Rayleigh granular jets

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