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Issue 16, 2009
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Inertial flow effects in a micro-mixer based on artificial cilia

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Abstract

The flow in a micro-mixer based on artificial cilia (J. M. J. den Toonder, F. M. Bos, D. J. Broer, L. Filippini, M. Gillies, J. de Goede, G. N. Mol, M. Reijme, W. Talen, J. T. A. Wilderbeek, V. Khatavkar and P. D. Anderson, Lab Chip, 2008, 8, 533–541) is studied. A numerical model is developed and simulations are performed for Reynolds numbers (Re), based on the cilium dimension, from 0 to 10. The mixing properties of the flow are investigated both quantitatively and qualitatively. Flow visualisation by optical coherence tomography (OCT) is performed, and experimental and numerical particle distributions are compared. It is found that for higher Reynolds numbers (Re > 0.1) inertial effects cause a flow reversal compared to lower Reynolds numbers (Re < 0.1). Flow inertia also results in a significant increase of the distributive mixing. The qualitative agreement between experiments and simulations at higher Re is good. This indicates that local inertia effects play a key role in the mixing effectiveness of the artificial cilia mixing.

Graphical abstract: Inertial flow effects in a micro-mixer based on artificial cilia

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Publication details

The article was received on 26 Jan 2009, accepted on 14 May 2009 and first published on 04 Jun 2009


Article type: Paper
DOI: 10.1039/B901660K
Citation: Lab Chip, 2009,9, 2326-2331
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    Inertial flow effects in a micro-mixer based on artificial cilia

    M. Baltussen, P. Anderson, F. Bos and J. den Toonder, Lab Chip, 2009, 9, 2326
    DOI: 10.1039/B901660K

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