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Proceedings Paper

Measurement of diffusive motion of micro-fluidic particles by Micro-PIVPTV technique
Author(s): Meng Yang; Hao-Li Wang; Wei Han
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Paper Abstract

The stochastic diffusive motions of sub-micrometer tracer particles have important effects on the velocity measurement accuracy of microfluidic particle image velocimetry (Micro-PIV). In this paper, we investigate the diffusions of 520nm particles in a square channel under the temperatures from 291K to 343K by micro-PIV/PTV technique. The displacements of particles in a couple of fames images within 30ms time intervals were evaluated by the PIV/PTV hybrid algorithm. Based on this, the logarithm distributions of square displacements and the spatial mean square displacements (SMSDs) were calculated. The results show that the distributions of particles displacements are fundamentally same under the same temperature at different moments. The logarithm of square displacements has the distributions ranging from -17 to -11, showing quasi-normal distribution characters. The value of spatial mean square displacements linearly increases with the increase of temperature, which indicates that the diffusion capabilities of particles have the increasing trend.

Paper Details

Date Published: 31 December 2010
PDF: 5 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754469 (31 December 2010); doi: 10.1117/12.885417
Show Author Affiliations
Meng Yang, College of Metrological Technology and Engineering (China)
Hao-Li Wang, College of Metrological Technology and Engineering (China)
Wei Han, College of Metrological Technology and Engineering (China)


Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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