Bubble free high efficiency electroosmotic pumps

Mena E. Tawfik, Thomas E. Hansen, F. J. Diez

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In generating high electroosmotic flows for use in microfluidic pumps, a limiting factor is faradaic reactions which appear at high electric fields. These reactions lead to higher power consumption and bubble generation at the electrodes. We are proposing a novel technique that can limit and even prevent gas generation. This will extend the current range of operation of electroosmotic pumps. This is achieved by applying a unidirectional pulsed DC voltage waveform. The optimum pulse voltage waveform (OPW) tested is based on a theoretical model developed by the authors [1]. The power consumed and the efficiency of an electroosmotic pump under the pulsed DC voltage is measured experimentally and compared with the conventional bipolar rectangular voltage waveform (BRW). Results show an increase in the efficiency for the OPW when compared to the BRW. This increase in efficiency is obtained by preventing the reverse cycle in the BRW which flows against the pumping direction.

Original languageEnglish (US)
Title of host publicationFora
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791857229
StatePublished - 2015
EventASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 - Seoul, Korea, Republic of
Duration: Jul 26 2015Jul 31 2015

Publication series

NameASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015


OtherASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Bubble free high efficiency electroosmotic pumps'. Together they form a unique fingerprint.

Cite this