Experimental study of Rayleigh-Taylor instability in a shock tube accompanying cavity formation

Citation
Xl. Wang et al., Experimental study of Rayleigh-Taylor instability in a shock tube accompanying cavity formation, JPN J A P 1, 40(11), 2001, pp. 6668-6674
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
11
Year of publication
2001
Pages
6668 - 6674
Database
ISI
SICI code
0021-4922(200111)40:11<6668:ESORII>2.0.ZU;2-C
Abstract
Rayleigh-Taylor instability at a gas-water interface has been investigated experimentally. Such instability was produced by accelerating a water Colum n down a vertical circular tube employing shock wave impact. Accelerations from 50 to 100 times gravitational acceleration with fluid depths from 125 to 250 mm were studied. The resulting instability from small amplitude rand om perturbations was recorded and later analyzed using high-speed video ima ges. Cavity formation was observed in the middle of the gas-water interface soon after the shock wave impact; bubbles and spikes then developed across the rest of the interfacial plane. Measurements of the growth coefficient of the bubbles and spikes show that they are nearly constant over different runs.