Nano Science and Technology Institute
Nanotech 2004 Vol. 1
Nanotech 2004 Vol. 1
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 7: Micro Fluidics and Nanoscale Transport

Optimization of Mixing in an Active Micromixing Device

Authors:G. Mathew, I. Mezic, R. Serban and L. Petzold
Affilation:University of California, Santa Barbara, US
Pages:300 - 303
Keywords:Micromixing, chaotic advection
Abstract:Microscale mixers can be divided into two broad classifications - passive and active. Passive mixers rely on geometric properties of the channel shape whereas active mixers rely on time-dependent perturbation of the fluid flow to achieve mixing. In this work, we consider the problem of characterizing the mixing performance of an active micromixer which consists of a main mixing channel within which the flow is perturbed by pressure-driven flow from three pairs of orthogonal secondary channels. Using the newly developed measure of mixing, the so-called ``Mix-Norm'', we study optimal values for the frequency and amplitude of the oscillating flow in the secondary channels. It is shown that with one side channel operating regions of poor mixing parameter values interlay with good mixing parameter values and that for the second and third channels mixing is good for a large range of parameter values.
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