Strong enhancement of straeming current power by application of two phase flow

Yanbo Xie, John D. Sherwood, Lingling Shui, Albert van den Berg, Jan C.T. Eijkel

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    We show that the performance of a streaming-potential based microfluidic energy conversion system can be strongly enhanced by the use of two phase flow. Injection of gas bubbles into a liquid-filled channel increases both the maximum output power and the energy conversion efficiency. In single-phase systems the internal conduction current induced by the streaming potential limits the output power, whereas in a two-phase system the bubbles reduce this current and increase the power. In our system the addition of bubbles enhanced the maximum output power of the system by a factor of 74 and the efficiency of the system by a factor of 163 compared with single phase flow.
    Original languageUndefined
    Pages (from-to)4006-4011
    Number of pages6
    JournalLab on a chip
    Issue number23
    Publication statusPublished - 2011

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