Document Type
Article
Publication Date
4-3-2013
Abstract
This paper presents a numerical study to investigate the effect of geometrical and material transition on the flow and progression of a sample plug in electrokinetic flows. Three cases were investigated: (a) effect of sudden cross-sectional area change (geometrical transition or mismatch) at the interface, (b) effect of only material transition (i.e. varying ζ-potential), and (c) effect of combined material transition and cross-sectional area change at the interface. The geometric transition was quantified based on the ratio of reduced flow area A2 at the mismatch plane to the original cross-sectional area A1. Multiple simulations were performed for varying degrees of area reduction i.e. 0-75% reduction in the available flow area, and the effect of dispersion on the sample plug was quantified by standard metrics. Simulations showed that a 13% combined material and geometrical transition can be tolerated without significant loss of sample resolution. A 6.54% reduction in the flow rates was found between 0% and 75% combined material and geometrical transition. © 2013 Elsevier B.V.
Publication Source (Journal or Book title)
Analytica Chimica Acta
First Page
103
Last Page
110
Recommended Citation
Rani, S., You, B., Soper, S., Murphy, M., & Nikitopoulos, D. (2013). Influence of material transition and interfacial area changes on flow and concentration in electro-osmotic flows. Analytica Chimica Acta, 770, 103-110. https://doi.org/10.1016/j.aca.2013.01.047
