Numerical evaluation of the transfer function of a low pressure DMA by using the Langevin dynamic equation

The effect of Brownian diffusive particle trajectory of nanoparticles on the transfer function of the low pressure Differential Mobility Analyzer (LPDMA) was evaluated by a numerical simulation of the Langevin dynamic equation. The results of the simulation were compared with previously reported experimental results ( Seto et al. 1997; Seol et al. 2000) and Stolzenburg's transfer function ( 1988). As the operational pressure decreased, the peak and FWHM( full width of the transfer function at half of its maximum) values of transfer function, as calculated by numerical simulation, were increased, which was not evident from Stolzenburg's transfer function. In comparison with the experiments of Seto et al., discrepancies in the higher electrical mobility regime than from central mobility were found, which could be caused by the incomplete flow control of their LPDMA. However, the transfer function, as calculated by numerical simulation was in good agreement with experimental results reported by Seol et al., performed with the improved LPDMA at well-controlled operation conditions.
Publisher
TAYLOR & FRANCIS INC
Issue Date
2005-08
Language
ENG
Keywords

DIFFERENTIAL MOBILITY ANALYZER; AEROSOL-PARTICLES; RESOLUTION; PERFORMANCE; OPERATION; MOTION; AIR

Citation

AEROSOL SCIENCE AND TECHNOLOGY, v.39, no.8, pp.701 - 712

ISSN
0278-6826
DOI
10.1080/02786820500182396
URI
http://hdl.handle.net/10203/10358
Appears in Collection
NE-Journal Papers(저널논문)
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