A system was developed to study electrostatic force control in mesoscale and microscale fluidic phenomena. Utilizing the polarization (dielectrophoretic) force in a simple planar electrode configuration, control of a liquid-bubble interface is achieved. By applying a +dc voltage a 1Hz switching frequency to an array of four electrode pairs, pumping was produced with four fluids covering a wide range of electrical properties; the range of dielectric constant and electric conductivity was over 1 order of magnitude and 5 orders of magnitude, respectively. Simple analysis and initial experimentation provide evidence that the normal polarization stress at the liquid-bubble interface and surface tension are the primary driving force and retarding force, respectively that affect bubble motion.
Control of Liquid-Bubble Interface to Create a Two-Phase, Dielectrophoretic Mesopump
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Helberg, CM, Jackson, JE, & Bryan, JE. "Control of Liquid-Bubble Interface to Create a Two-Phase, Dielectrophoretic Mesopump." Proceedings of the ASME 2005 International Mechanical Engineering Congress and Exposition. Fluids Engineering. Orlando, Florida, USA. November 5–11, 2005. pp. 369-374. ASME. https://doi.org/10.1115/IMECE2005-82878
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