Effect of Microchannel Diameter on Electroosmotic Flow Hysteresis

Electroosmotic flow (EOF) commonly involves inhomogeneous fluids in practical applications. EOF hysteresis, which is defined as direction-dependent behavior, has been extensively investigated for dissimilar solution pair systems. Hitherto, there no investigation being conducted to examine the effect of microchannel diameter on hysteresis phenomenon. In this investigation, current monitoring experiments and finite element numerical simulations were performed intensification hysteretic behavior with reduction diameter. Three pairs selected study, namely KCl–NaCl (dissimilar ionic species similar concentration), NaCl KCl (similar but different concentrations) pairs, microchannels 5 ?m 100 internal diameters. augmentation reduced channel (i.e., microchannel) due coupling resultant wider/tighter interfacial width minority pH-governing ion-driven was earlier discovered be origin hysteresis. This provides an appropriate understanding dimensional involving multiple fluids, outcomes can potentially implemented chemical biological microfluidic systems adjustable throughput.