The transient boiling phenomena occurring on a planar heater in He II are visually studied to investigate the onset condition and the bifurcation criterion. The whole flow field is visualized with the aid of Schlieren and shadowgraph optics. After step-wise heating, local boiling sites appear and de
Oscillatory phenomena related to noisy film boiling in superfluid helium II
β Scribed by P. Zhang; M. Murakami; R.Z. Wang
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 197 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0375-9601
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β¦ Synopsis
In this study, oscillatory phenomena in He II during noisy film boiling are studied by the aid of temperature and pressure oscillations measurements. Temperature oscillation in He II is measured by a superconductor temperature sensor, and pressure oscillation by a pressure sensor. A strong correlation between temperature and pressure oscillations is found.
π SIMILAR VOLUMES
Continuous wavelet transform (CWT) is employed in the analysis of the pressure oscillation and the temperature oscillation in the film boiling of He II. The CWT analysis results provide the detailed time-varying frequency content, which can not be obtained in the ordinary Fourier transform. It can d
The existence of a persistent current in a saturated He ll film which is adsorbed on the walls of a container of typical dimensions 1 cm is demonstrated. The persistent current is produced by rotation and detected by measuring the critical film flow rate.