Entropic Evaluation of Dean Flow Micromixers

P. S. Fodor[1], M. Kaufman[1]
[1]Cleveland State University, Cleveland, OH, USA
Veröffentlicht in 2013

In this work we investigate computationally the use of spiral channels at Reynolds numbers from 25 to 900 as a mixing structure (Figure 1) using COMSOL Multiphysics, the CFD Module, and the Chemical Species Transport physics. In this system, the centrifugal forces experienced by the fluid as it travels along the curved trajectory induce counter-rotating flows. The presence of these transversal flows promotes the mixing of chemical species that are introduced in the system at different positions across the section of the channel. Concentration images obtained along the channel are used to evaluate the mixing efficiency using a measure [3] based on the Shannon entropy.