Реферат: An air bubble is injected into a liquid near the surface of an ultrasonic transducer and exposed to an ultrasonic field 11 in order to increase the surface of the bubble-liquid interface. The purpose of this theoretical and experimental work 12 is to investigate the effect of liquid viscosity on the relative increase of the bubble-liquid interface with ultrasonic 13 cavitation. Numerically, the estimation of the relative increase of the air bubble surface is based on an iterative process. 14 The distance between the air bubbles and the transducer, as well as the liquid viscosity, greatly impact the surface 15 relative increase. The optimal distance from the transducer is approximately 10 mm. At low viscosity, the surface area 16 can increase by up to 1.7 times, but as the liquid viscosity increases above 7 mPa.s, there is no significant increase. 17 Experimentally, air bubbles subjected to ultrasonic cavitation are observed and analyzed. The image analysis algorithm 18 is based on analyzing the external contour of the bubble combined with the brightness gradients in the image. The 19 experimental observations are similar as observed numerically. The relative increase of the surface area decreases with 20 the viscosity. Above a viscosity of approximately 7.4 mPa.s, there is almost no further relative increase.

Библиографическая ссылка: Golykh R.N. , Carrat J.-B. , Manyakhin I.A. , Barsukov A.R.
Influence of liquid viscosity on growth of the surface of an air bubble subjected to ultrasonic cavitation
Physics of Fluids. 2025. V.37. N12. 122106 :1-15. DOI: 10.1063/5.0300785 WOS Scopus

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Web of science:	WOS:001629347800022
Scopus:	2-s2.0-105024077823

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