Abstract
We present two micro-devices, fabricated by using MEMS technology, in which mixing of fluid and particles takes place. The systems are designed to induce folding and stretching of material lines, leading to chaotic-like mixing. In a first case, we use unsteady pressure perturbations superimposed to a mean stream, and in the second case, time-dependent dielectrophoretic forces to induce folding and stretching. The first device shows chaotic-like mixing is achieved in an efficient way, leading to rapidly homogenizing concentration fields. Folding and stretching effects inducing mixing are shown for the second system. The systems are simple in their conception and may favorably be integrated within complex bio-MEMS or μTAS systems.
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References
J.M. Ottino, The Kinematics of Mixing:Stretching, Chaos, and Transport, Cambridge University Press, New York, 1989.
Liu, R. H., et al., “Passive mixing in a three-dimensional serpentine microchannel, ” J. MEMS, pp. 190–197, 2000.
M. Volpert, C. D. Meinhart„ I. Mezic, and M. Dahelh, “An Actively Controlled Micromixer, ” Proceeding of MEMS, ASME IMECE, Nashville, Tennessee, Nov., pp. 483–487, (1999).
Lee, Y. K., Shih, C., Tabling, P., Ho, C. M., 1999, “Characterization of Mixing Process in a Microchannel Flow, ” presented at the 52-th Annual Meeting of American Physical Society, Division of Fluid Dynamics, Nov., New Orleans.
J. P. Eckmann and S. O. Kamphorst, “Liapunov Exponents from Time Series, ” Physical Review A, Vol. 34, No. 6, pp.4971–4979, (1986).
A. Wolf, J. B. Swift, H. L. Swinney, and J. A. Vastano, “Determining Lyapunov Exponents from a Time Series, ” Physica D, Vol. 16D, No. 3, pp. 285–317, (1985)).
H.A. Pohl, “Dielectrophoresis: the Behavior of Neutral Matter in Nonuniform Electric Fields”, Cambridge University Press, (1978).
Ramos, H. Morgan, N.G. Green, and A. Castellanos, “The Role of Electrohydrodynamic Forces in the Dielectrophoretic Manipulation and Separation of Particles”, J. Electrostatics, 47, (1999), pp. 71–81.
T. Schnelle, T. Müller, G. Gradl, S.G. Shirley, G. Fuhr, “Dielectrophoretic Manipulation of Suspended Submicron Particles”, Electrophoresis, 21, (2000), pp. 66–73.
M.P. Hughes, “Ac Electrokinetics: Applications for Nanotechnology”, Nanqtechnology, 11, (2000), pp. 124–132.
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© 2001 Springer-Verlag Berlin Heidelberg
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Lee, YK., Deval, J., Tabeling, P., Ho, CM. (2001). Chaotic Mixing In Electrokinetically And Pressure Driven Micro Flows. In: Matlosz, M., Ehrfeld, W., Baselt, J.P. (eds) Microreaction Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56763-6_20
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DOI: https://doi.org/10.1007/978-3-642-56763-6_20
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-62706-4
Online ISBN: 978-3-642-56763-6
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