Abstract
We report on a new method of visualizing qualitatively a fluid flow field around an oscillating cavitation bubble. The near infrared radiation of a Q-switched Nd:YAG laser is focused in deionized water and in a solution of copper sulphate for contrast enhancement to generate a cavitation bubble in free space and in front of a solid boundary. Using high-speed photography and an accurately positioned schlieren knife edge we are able to visualize the heated path of the laser beam and the different stages of the oscillating bubble with high spatial resolution. For the case of a bubble in free space the marked laser path indicates radial fluid flow only. For a bubble in front of a solid boundary the marked laser path clearly shows the motion of the fluid through the bubble during the collapse process. The marked paths are similar to numerically calculated streamline plots.
| Original language | English |
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| Pages (from-to) | 3201-3208 |
| Number of pages | 8 |
| Journal | Physics of Fluids |
| Volume | 9 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 1997 |
| Externally published | Yes |