Rayleigh–Taylor instability of cylindrical water droplet induced by laser-produced cavitation bubble
| Autor: | Hongchen Li, Zhan Wang, Akihisa Abe, Wenlu Guo, Jingzhu Wang, Chenguang Huang, Yiwei Wang, Tezhuan Du |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Mechanics Deformation (meteorology) Condensed Matter Physics 01 natural sciences Instability 010305 fluids & plasmas Physics::Fluid Dynamics Mechanics of Materials Inviscid flow Cavitation 0103 physical sciences Compressibility Rayleigh–Taylor instability 010306 general physics Dimensionless quantity Phase diagram |
| Zdroj: | Journal of Fluid Mechanics. 919 |
| ISSN: | 1469-7645 0022-1120 |
| Popis: | This study gives insights into the interfacial instability of water droplets through a combination of laboratory experiments, numerical simulations and analytical modelling. An experiment is conducted in a narrow gap between two plates to model the two-dimensional cylindrical geometry, and a pulsed laser beam is focused inside a water droplet to generate a cavitation bubble. Three distinct characteristics of droplet deformation can be observed: (i) splashing; (ii) ventilating; and (iii) a stable state. In addition, an analytical model considering the Rayleigh–Taylor instability and bubble oscillation is developed based on the assumption that fluid is inviscid and incompressible. The analytical model is solved to obtain a phase diagram describing three distinct phenomena. Two dimensionless parameters, . Finally, the phase diagram is verified by the experimental and numerical results. |
| Databáze: | OpenAIRE |
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