Qualitative study of AC electroosmotic micropumps by computational modeling of non-equilibrium electrokinetics uri icon

Abstract

  • In this work, qualitative results on computational modeling of three different electrode geometries employed to pump fluids in periodic sections of microchannels are presented. For this purpose, the nonequilibrium approach, which comprises the Poisson, Nernst-Plank, and Navier-Stokes equations, was solved through the finite element method. The modeled sections, which are 30 ¿m wide and 10 ¿m tall, are divided into quarters for an even distribution of blocks among different geometries. In this fashion, the outer quarters are gaps, while the two inner quarters are locations to fit the different electrode geometries. Our simulations show meaningful flow variations between the three types of electrodes, which are of up to three orders of magnitude. Through computational modeling, it is qualitatively assessed the difference between three electrode geometries, which is in good accordance with theory and experimental data that has been previously reported by other researchers.

Publication date

  • January 1, 2014