Shock Waves in an Electrochemical Microactuator

The explosive mode of operation of an electrochemical actuator is studied. In this mode of operation, we observe explosion of microbubbles containing the oxygen–hydrogen gas mixture that forms in the working chamber of the actuator during electrochemical water splitting by high-frequency pulses of a...

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Bibliographic Details
Published inTechnical physics letters Vol. 44; no. 12; pp. 1096 - 1099
Main Author Postnikov, A. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2018
Springer Nature B.V
Subjects
Classical and Continuum Physics
Collapse
Explosions
Gas mixtures
Microactuators
Photography
Physics
Physics and Astronomy
Polarity
Shock waves
Water splitting
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Summary:The explosive mode of operation of an electrochemical actuator is studied. In this mode of operation, we observe explosion of microbubbles containing the oxygen–hydrogen gas mixture that forms in the working chamber of the actuator during electrochemical water splitting by high-frequency pulses of alternating polarity. We demonstrate that shock wave emission occurs as a result of implosion of the void formed due to the microbubble explosion, rather than the explosion of the microbubble itself. Using the experimentally measured variation in the bubble wall velocity with the distance from the explosion center, we estimate the pressure amplitude at the shock front. The dynamic of microbubble collapse is established using time-resolved photography.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785018120337