Experiments on traveling-wave electroosmosis: effect of electrolyte conductivity

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Publisher: Institute of Electrical and Electronics Engineers, Inc.
Document Type: Author abstract; Report
Length: 123 words

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Abstract :

Net flow of electrolyte induced by Pt microelectrodes subjected to traveling-wave potentials is studied experimentally. Three different concentrations of KCI in water are considered in order to determine the effect of the electrolyte conductivity on the induced velocity. This work intends to generate more experimental data that can be compared to theoretical models. The experiments at low voltages show that the induced velocity decreases with electrolyte conductivity while the characteristic frequency increases, as theoretically expected. Previous experiments showed that the net flow is reversed for voltage amplitudes above a threshold. In the present work, the threshold voltage for the different electrolyte conductivities is also reported and is found to increase with electrolyte conductivity. Index Terms--Micropumps, electrohydrodynamics, liquids, traveling wave potential, microelectrodes, electrolyte conductivity.

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Gale Document Number: GALE|A198471873