Abstract
Slippage of liquids at hydrophobic surfaces in microchannels has frequently been observed. We present here an analytical solution for oscillating flow in circular microchannels by combining the electrokinetic transport phenomena with Navier's slip condition. For pressure-driven flow, our results suggest that slippage of a typical electrolyte solution at a channel wall with a 10% slip length can improve fluid flow rate by about 20%. With respect to electro-osmotic pumping at a given flow rate, we showed that the voltage requirement for a typical electrolyte solution can be greatly reduced, by as much as 90% for a 1% slip length and 99% for a 10% slip length. Our results are useful to precisely control time-dependent microflow in microfluidic microelectromechanical system devices. They also provide design guidelines to improve the efficiency of lab-on-a-chip devices and miniature mechanical pumping/cooling systems by inducing slippage of liquids at the channel wall.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
