Measurement of diffusive motion of micro-fluidic particles by Micro-PIVPTV technique

Meng Yang; Hao-Li Wang; Wei Han

doi:10.1117/12.885417

31 December 2010 Measurement of diffusive motion of micro-fluidic particles by Micro-PIVPTV technique

Meng Yang, Hao-Li Wang, Wei Han

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754469 (2010) https://doi.org/10.1117/12.885417
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

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.

Citation Download Citation

Meng Yang, Hao-Li Wang, and Wei Han "Measurement of diffusive motion of micro-fluidic particles by Micro-PIVPTV technique", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754469 (31 December 2010); https://doi.org/10.1117/12.885417

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