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Chinese Physics, 2004, Vol. 13(10): 1747-1752    DOI: 10.1088/1009-1963/13/10/031
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

RT instability in cylindrical implosion of jelly ring

Yang Li-Bing (杨礼兵), Liao Hai-Dong (廖海东), Sun Cheng-Wei (孙承纬), Ouyang Kai (欧阳凯), Li Jun (李军), Huang Xian-Bin (黄显宾)
Institute of Fluid Physics, CAEP, P.O. Box 919-108, Mianyang 621900, China
Abstract  The interfacial RT instability experiments on imploding jelly liners in cylindrically convergent geometry have been performed. The liner's instability growth was observed clearly with a high-speed framing camera. Jelly liners have different initial perturbation forms on their inner and outer interfaces, being either smooth or sinusoidal. The initial perturbations also have different magnitudes and spatial frequencies (for example, mode n=5, 10, 20). The experimental results show that the growth and coupling of perturbations on inner and outer surfaces are remarkably different. Meanwhile, the relevant 2-D numerical simulation of hydrodynamics combined with Level Set method has been performed. Using the numerical code, we can design the parameters of imploding jelly liner, and predict the experimental results. The results of simulation are demonstrated to be in good agreement with the measured data in a series of experiments.
Keywords:  hydrodynamic instability      perturbation      jelly ring  
Received:  07 March 2003      Revised:  14 May 2004      Accepted manuscript online: 
PACS:  47.20.Ma (Interfacial instabilities (e.g., Rayleigh-Taylor))  
  47.11.-j (Computational methods in fluid dynamics)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10035030).

Cite this article: 

Yang Li-Bing (杨礼兵), Liao Hai-Dong (廖海东), Sun Cheng-Wei (孙承纬), Ouyang Kai (欧阳凯), Li Jun (李军), Huang Xian-Bin (黄显宾) RT instability in cylindrical implosion of jelly ring 2004 Chinese Physics 13 1747

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