We experimentally investigate the evolution and interaction of two Richtmyer–Meshkov-unstable gas cylinders using concentration field visualization and particle image velocimetry. The heavy-gas cylinders have an initial spanwise separation of (where D is the cylinder diameter) and are simultaneously impacted by a planar, Mach 1.2 shock. The resulting flow morphologies are highly reproducible and highly sensitive to the initial separation, which is varied from to 2.0. The effects of the cylinder–cylinder interaction are quantified using both visualization and high-resolution velocimetry. Vorticity fields reveal that a principal interaction effect is the weakening of the inner vortices of the system. We observe a nonlinear, threshold-type behavior of inner vortex formation around A correlation-based ensemble-averaging procedure extracts the persistent character of the unstable flow structures, and permits decomposition of the concentration fields into mean (deterministic) and fluctuating (stochastic) components.
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April 2003
Research Article|
April 01 2003
A quantitative study of the interaction of two Richtmyer–Meshkov-unstable gas cylinders Available to Purchase
C. Tomkins;
C. Tomkins
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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K. Prestridge;
K. Prestridge
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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P. Rightley;
P. Rightley
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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M. Marr-Lyon;
M. Marr-Lyon
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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P. Vorobieff;
P. Vorobieff
Department of Mechanical Engineering, University of New Mexico, Albuquerque, New Mexico 87131
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R. Benjamin
R. Benjamin
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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C. Tomkins
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
K. Prestridge
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
P. Rightley
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
M. Marr-Lyon
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
P. Vorobieff
Department of Mechanical Engineering, University of New Mexico, Albuquerque, New Mexico 87131
R. Benjamin
Dynamic Experimentation Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Physics of Fluids 15, 986–1004 (2003)
Article history
Received:
August 06 2002
Accepted:
December 30 2002
Citation
C. Tomkins, K. Prestridge, P. Rightley, M. Marr-Lyon, P. Vorobieff, R. Benjamin; A quantitative study of the interaction of two Richtmyer–Meshkov-unstable gas cylinders. Physics of Fluids 1 April 2003; 15 (4): 986–1004. https://doi.org/10.1063/1.1555802
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