Abstract

Microfluidic devices have many potential applications, such as BioMEMs (microelectromechanical systems for biomedical applications), miniature fuel cells, and microchannel cooling of electronic circuitry. One of the important considerations of microfluidic devices for analytical and bioanalytical chemistry is the dispersion of solutes. In this study, the dispersion of passive analyte between two miscible fluids of similar properties in a side-by-side pressure-driven creeping flow is examined. This study represents a first effort in applying the lubrication approximation together with the depthwise averaging method to analyze mass transport of passive analyte in a two-stream rectangular microchannel with consideration of the Taylor-Aris dispersion effect.

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