A microfluidic device for the study of the orientational dynamics of microrods

Y. N. Mishra; J. Einarsson; O. A. John; P. Andersson; B. Mehlig; D. Hanstorp

doi:10.1117/12.915871

14 February 2012 A microfluidic device for the study of the orientational dynamics of microrods

Y. N. Mishra, J. Einarsson, O. A. John, P. Andersson, B. Mehlig, D. Hanstorp

Proceedings Volume 8251, Microfluidics, BioMEMS, and Medical Microsystems X; 825109 (2012) https://doi.org/10.1117/12.915871
Event: SPIE MOEMS-MEMS, 2012, San Francisco, California, United States

Abstract

We describe a microfluidic device for studying the orientational dynamics of microrods. The device enables us to experimentally investigate the tumbling of microrods immersed in the shear flow in a microfluidic channel with a depth of 400 μm and a width of 2.5 mm. The orientational dynamics was recorded using a 20X microscopic objective and a CCD camera. The microrods were produced by shearing microdroplets of photocurable epoxy resin. We show different examples of empirically observed tumbling. On the one hand we find that short stretches of the experimentally determined time series are well described by fits to solutions of Jeffery's approximate equation of motion [Jeffery, Proc. R. Soc. London. 102 (1922), 161-179]. On the other hand we find that the empirically observed trajectories drift between different solutions of Jeffery's equation. We discuss possible causes of this orbit drift.

Citation Download Citation

Y. N. Mishra, J. Einarsson, O. A. John, P. Andersson, B. Mehlig, and D. Hanstorp "A microfluidic device for the study of the orientational dynamics of microrods", Proc. SPIE 8251, Microfluidics, BioMEMS, and Medical Microsystems X, 825109 (14 February 2012); https://doi.org/10.1117/12.915871

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