Abstract
Ultrasonic oscillations find their wide application in various sectors and industries: metallurgy, chemical and food industries, in engineering, in medicine. This is due to physical and chemical changes when exposed to the sound field. Cavitation in ultrasonic field causes the dispersion and emulsification of certain substances and promotes coagulation and degassing affects of crystallization and dissolution. It is known that ultrasonic vibrations also cause a variety of chemical transformations of substances such as oxidation, recovery, polymerization, and depolymerization. Researchers of cavitation action on the matter find the explanation of these phenomena: shock waves and, consequently, acoustic wind. The experiments were conducted in liquid environment (non-distilled water). The volume of the experimental sample amounted to 10 dm3. Method of the magnetostriction was applied to receive ultrasonic vibration, the principle of which consists in transforming electrical oscillations into mechanical. The level of cavitation was checked in two stages to evaluate the cavitation mode according to the degree of erosion of the artificial barriers and to measure the intensity of cavitation noise in the volume.
Highlights
IntroductionThe laws of non-linear acoustics can describe ultrasonic waves of high intensity
1.1 Nature of ultrasoundUltrasound is elastic vibrations
Application of ultrasonic field for the intensification of redox processes in the water environment, deposition of particulate impurities extends the scope of the possible use of this physical method [1, 2, 3, 4]
Summary
The laws of non-linear acoustics can describe ultrasonic waves of high intensity. The distribution of ultrasonic waves in liquids is accompanied by acoustic flow, compression and rarefaction of the environment. Acoustic cavitation is among the important non-linear phenomena in ultrasonic field. Investigation of the influence of acoustic fields on substances is complicated due to various simultaneous processes that can influence each other in the ultrasonic field. Theoretical justification of physical methods is evaluated, in particular ultrasonic vibrations in water technologies. Application of ultrasonic field for the intensification of redox processes in the water environment, deposition of particulate impurities extends the scope of the possible use of this physical method [1, 2, 3, 4]
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