Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
| <mark>Journal publication date</mark> | 1/06/2017 |
|---|---|
| <mark>Journal</mark> | Journal of Low Temperature Physics |
| Issue number | 5-6 |
| Volume | 187 |
| Number of pages | 7 |
| Pages (from-to) | 376-382 |
| Publication Status | Published |
| Early online date | 28/10/16 |
| <mark>Original language</mark> | English |
We report direct optical observation of cavitation bubbles in liquid helium, both in classical viscous He I and in superfluid He II, close to the λ-transition. Heterogenous cavitation due to the fast-flowing liquid over the rough surface of prongs of a quartz tuning fork oscillating at its fundamental resonant frequency of 4kHz occurs in the form of a cluster of small bubbles rapidly changing its size and position. In accord with previous investigators, we find the cavitation threshold lower in He I than in He II. In He I, the detached bubbles last longer than one camera frame (10 ms), while in He II the cavitation bubbles do not tear off from the surface of the fork up to the highest attainable drive.