The mechanism of the appearance of luminescence and electrification in liquid flows through narrow channels

Autor: V. N. Pil’gunov, M. A. Margulis
Rok vydání: 2009
Předmět:
Zdroj: Russian Journal of Physical Chemistry A. 83:1789-1793
ISSN: 1531-863X
0036-0244
DOI: 10.1134/s0036024409100288
Popis: The mechanism of the effects observed in hydrodynamic unit throttles was studied. These effects included luminescence in the visible range localized in a microscopic toroidal volume and electric pulses when a dielectric liquid flew through a narrow passage orifice. Equations for charging and conduction currents were obtained. The stationary electric charge, potential, and field strength on the internal surface of a passage orifice were calculated. It was shown theoretically that the appearance of luminescence most probably occurred in electrical breakdowns in cavitation bubbles in the initial flow section inside the passage orifice. Electric charge formed not only during hydrodynamic cavitation but also in a laminar throttle in the absence of cavitation in the liquid; the electrokinetic mechanism applied to this phenomenon too. It was shown experimentally that electric charges appeared not only in plastic but also in metallic throttles. The suggested mechanism of light emission and electric charge appearance was in agreement with the experimental results.
Databáze: OpenAIRE
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