Abstract
There have been tried many types of liquids with different ranges of viscosity values that have been tested to form a single cavitation bubble. The purpose of these experiments was to observe the behaviour of cavitation bubbles in media with different ranges of absorbance. The most of the method was based on spark to induced superheat limit of liquid. Here we used arrangement of the laser-induced breakdown (LIB) method. There were described the set cavitation setting that affects the size bubble in media with different absorbance. We visualized the cavitation bubble with a 60 kHz high speed camera. We used here shadowgraphy setup for the bubble visualization. There were observed time development and bubble extinction in various media, where the size of the bubble in the silicone oil was extremely small, due to the absorbance size of silicon oil.
Highlights
The cavitation phenomena is mainly known for its undesirable effects in turbo machinery, there is a great potential for its utilization in the industry, medicine, biology, pharmacy, or tissue engineering.The research in the field of cavitation was previously focused mainly on the investigation of the bubble behavior in the vicinity of rigid or flexible boundaries; [1,2,3,4] the current investigations require including the description of response of the impacted material itself. [1,2] The definition of the material response can help in development of new, more resistant structures or layers which better withstand the action of cavitation bubbles and prolong the service life of products
The key in the understanding of the cavitation interaction with various materials is the investigation of the impact of individual bubbles and its structures [1]
The convenient method for generating single cavitation bubble that can be very precisely geometrically placed in the volume of the liquid, and close to the sample, is Laser Induced Breakdown (LIB). [5,6,7,8,9] The laser-induced breakdown (LIB) method enables to generate cavitation bubble using ultrashort pulses of milijoules energies
Summary
The cavitation phenomena is mainly known for its undesirable effects in turbo machinery, there is a great potential for its utilization in the industry, medicine, biology, pharmacy, or tissue engineering. [5,6,7,8,9] The LIB method enables to generate cavitation bubble using ultrashort pulses of milijoules energies. The convenient method for generating single cavitation bubble that can be very precisely geometrically placed in the volume of the liquid, and close to the sample, is Laser Induced Breakdown (LIB). This method is thermal breakdown based on natural plasma generation. Most determinations are performed so that the maximum absorbance value lies around the value of 1 [13]
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