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Vortex dynamics in 3D shock-bubble interaction

delete2013-09-17
delete17
PRE
AI
B
Babak Hejazialhosseini *
D
Diego Rossinelli
P
Petros Koumoutsakos
DOI:10.1063/1.4819345delete
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摘要

摘要

En 中文
The dynamics of shock-bubble interaction involve an interplay of vortex stretching, dilation, and baroclinic vorticity generation. Here, we quantify the interplay of these contributions through high resolution 3D simulations for several Mach and Atwood numbers. We present a volume rendering of density and vorticity magnitude fields of shock-bubble interaction at M = 3 and air/helium density ratio eta = 7.25 to elucidate the evolution of the flow structures. We distinguish the vorticity growth rates due to baroclinicity, stretching, and dilatation at low and high Mach numbers as well as the late time evolution of the circulation. The results demonstrate that a number of analytical models need to be revised in order to predict the late time circulation of shock-bubble interactions at high Mach numbers. To this effect, we propose a simple model for the dependence of the circulation to Mach number and ambient to bubble density ratio for air/helium shock-bubble interactions. (C) 2013 AIP Publishing LLC.
Keyword:
GAS
SCHEMES
IMPLEMENTATION
GENERATION
FLOWS
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期刊

Physics of Fluids 封面图
Physics of Fluids
IF:
4.3
论文数:
2.9W
被引数:
8.0W

机构

S
swiss federal institutes of technology domain
学者数:
9.0W
论文数: 8.0W
被引数: 163
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