Investigation of active interface control of pressure driven two-fluid flow in microchannels
Wong, Teck Neng
Ooi, Kim Tiow
Date of Issue2006
School of Mechanical and Aerospace Engineering
We report a novel concept to control the interface location of a pressure-driven multi-phase flow in a microchannel by using electroosmotic flow effects. This concept has potential applications in flow switching and cell sorting in bio-analytical systems. In an H-shaped microchannel structure, aqueous sodium chloride (NaCl) solution and glycerol diluted with water were pumped through two inlets at the same flow rate. The electric field was applied on the electrolyte solution side. Adjusting the magnitude and direction of electric field has successfully controlled the interface position between the two phases. This technique provides a new approach to control the interface position between the two fluids.
Sensors and actuators A: physical
© 2006 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Sensors and actuators A: physical, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1016/j.sna.2006.06.034.