A numerical study of Richtmyer–Meshkov instability driven by cylindrical shocks
作者:
Qiang Zhang,
Mary Jane Graham,
期刊:
Physics of Fluids
(AIP Available online 1998)
卷期:
Volume 10,
issue 4
页码: 974-992
ISSN:1070-6631
年代: 1998
DOI:10.1063/1.869624
出版商: AIP
数据来源: AIP
摘要:
As an incident shock wave hits a material interface between two fluids of different densities, the interface becomes unstable. Small disturbances at the interface start to grow. This interfacial instability is known as a Richtmyer–Meshkov (RM) instability. It plays an important role in the studies of inertial confinement fusion and supernova. The majority of studies of the RM instability were in plane geometry—namely, plane shocks in Cartesian coordinates. We present a systematic numerical study of the RM instability driven by cylindrical shocks for both the imploding and exploding cases. The imploding (exploding) case refers to a cylindrical shock colliding with the material interface from the outside in (inside out). The phenomenon of reshock caused by the waves reflected from the origin is also studied. A qualitative understanding of this system has been achieved. Detailed studies of the growth rate of the fingers at the unstable interface are presented. ©1998 American Institute of Physics.
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