Prof. Ciro Filemon Flores-Rivera
Instituto Tecnológico y de Estudios Superiores de Monterrey, México
June 21, 2011 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room
Host: Dorian Liepmann
An interesting application in microfluidics is a micromixer. It is a micrometric device capable of obtaining a uniform distribution from several components of a mix. Such components can be fluids with different concentrations coming into the micromixer and, by electroosmotic effects and physical perturbations on their path, are mixed forming another fluid with uniform density at the outlet. Some of their applications appear in biochemical micro-laboratories (lab-in-chip). Physical laws modeling a micromixer are those of fluid mechanics (Navier-Stokes eqs.), as well as the convection-diffusion equation for current density and concentration. Velocity of fluid and electric field are related by means of the Helmholtz-Smoluchowski equation which is used to set certain boundary conditions. Two innovative designs of a micromixer following electroosmotic principles in a geometry with obstacles for the fluid will be presented. Furthermore, known reports from literature are verified to validate the mathematical method and to do a comparison and appreciate the advantages of the proposed designs.
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