Experimental Study of the Phenomenon of Luminescence in Electrodynamic Processes During Hydrodynamic Cavitation

The issue of the physics process of hydrodynamic luminescence formation requires careful research. In scientific and technical literature, two terms denoting the glow of a liquid are widely used: sonoluminescence and light emission. The first term is directly related to ultrasound as the cause the liquid to glow; the second - provides a wider range of reasons that cause the glow. One way or another, both processes have two main theories of their occurrence – “thermal” and “electric”. The “thermal” theory assumes that when an external influence is applied to a cavitating bubble, high temperatures are formed inside it, which stimulate the emission of radiation by the bubble. The “electrical” theory is based on electrical phenomena inside the bubble itself or interaction with nearby cavitating bubbles. The practical value of the work results is determined by the search for a reliable theory of the phenomenon of hydrodynamic luminescence. The obtained results contribute to a deeper understanding of the studied phenomena and create a basis for the development of an experimentally based theory of the origin of the phenomena of sonoluminescence and hydroluminescence, which has a positive effect on the introduction of these phenomena into technological processes. The relevance of the study is also due to the wide use of dielectric pipelines when supplying hydrocarbon and other liquids to various technical devices. In the future, it is possible to use these processes in the chemistry, pharmaceutical industry, and the creation of effective methods of surface treatment with liquids.