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Observation of chemiluminescence induced by hydrodynamic cavitation in microchannelsPodbevšek, Darjan ...We have performed hydrodynamic cavitation experiments with an aqueous luminol solution as the working fluid. Light emission, together with the high frequency noise which characterizes cavitation, was ... emitted by the two-phase flow, whereas no light emission from luminol was recorded in the single phase liquid flow. Light emission occurs downstream transparent microdiaphragms. The maximum level of the recorded signal was around 180 photons per second with flow rates of 380 [micro]Gl/s, that corresponds to a real order of magnitude of the chemiluminescence of 75,000 photons per second. The yield of emitted photons increases linearly with the pressure drop, which is proportional to the square of the total flow rate. Chemiluminescence of luminol is a direct and a quantitative demonstration of the presence of OH hydroxyl radicals created by hydrodynamic cavitation. The presented method could be a key to optimize channel geometry for processes where radical production is essential.Source: Ultrasonics Sonochemistry. - ISSN 1350-4177 (Vol. 43, May 2018, str. 175-183)Type of material - article, component partPublish date - 2018Language - englishCOBISS.SI-ID - 16334619
Author
Podbevšek, Darjan |
Colombet, D. |
Ledoux, Gilles |
Ayela, F.
Topics
hydrodynamic cavitation |
chemiluminescence |
radical production |
microfluidics |
luminol |
hidrodinamika |
kavitacija |
luminol |
mikrofluidi
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Podbevšek, Darjan | 52793 |
Colombet, D. | |
Ledoux, Gilles | |
Ayela, F. |
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