Numerical Investigation of Cavitation Bubble Dynamics Near Walls
The collapse of cavitation bubbles near walls is one of the major reasons for failure of technical devices involving the processing of liquids at large pressure differences. High-speed photography gives a first insight into the bubble dynamics during the collapse , and shows two fundamental phenomena during the non-spherical cavitation bubble collapse process: first the development of high-speed jets and second the release of shock-waves upon final bubble collapse. Both, the impact of shock waves and of high-speed jets on a surface can lead to material erosion. A more detailed experimental investigation including a precise determination of peak pressures at the wall and its association with the initial bubble configuration and evolution is beyond current experimental capabilities.
KeywordsCavitation Bubble Vapor Bubble Wall Pressure Semimajor Axis Bubble Collapse
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