In comparison to cavitation bubbles ocurring under normal or higher pressure, the bubble dynamics in negative pressure have not been researched in detail. This is the reason why this thesis contains description of design and construction of a pressure chamber that will enable low pressures and analysis of laser-induced cavitation bubbles. The first part of the thesis covers the theoretical background of a laser-induced bubble, while the second part focuses on the design of a pressure chamber. We designed it within dimensions that enable it to fit on positioning equipment and after, we checked it's integrity via solidworks simulation. The 3D printed chamber was tested for flaws, such as inadequate sealing and water sucking. We integrated their corrections in later versions and after the chamber met the standards, we generated laser-induced cavitation bubbles at four different pressures and captured images of the bubbles. In the third part of the thesis, we analyzed and compared theoretical data of the bubble's diameter with actual diameters. Our research has shown the differences in the size and time of existence, between bubbles generated in atmospheric and negative pressures. Gathered research works well as a foundation for future work that would focus on the effects of the surroundings on cavitation bubbles or the effect these bubbles' collapse would have on their surroundings if they were generated in negative pressures.
|
