NDLI: Effect of incident shock wave strength on the decay of Richtmyer–Meshkov instability-introduced perturbations in the refracted shock wave

Content Provider	SpringerLink
Author	Bailie, C. McFarland, J. A. Greeugh, J. A. Ranjan, D.
Copyright Year	2012
Abstract	The effect of incident shock wave strength on the decay of interface introduced perturbations in the refracted shock wave was studied by performing 20 different simulations with varying incident shock wave Mach numbers (M ~ 1.1− 3.5). The analysis showed that the amplitude decay can be represented as a power law model shown in Eq.7, where A is the average amplitude of perturbations (cm), B is the base constant (cm−(E−1), S is the distance travelled by the refracted shockwave (cm), and E is the power constant. The proposed model fits the data well for low incident Mach numbers, while at higher mach numbers the presence of large and irregular late time oscillations of the perturbation amplitude makes it hard for the power law to fit as effectively. When the coefficients from the power law decay model are plotted versus Mach number, a distinct transition region can be seen. This region is likely to result from the transition of the post-shock heavy gas velocity from subsonic to supersonic range in the lab frame. This region separates the data into a high and low Mach number region. Correlations for the power law coefficients to the incident shock Mach number are reported for the high and low Mach number regions. It is shown that perturbations in the refracted shock wave persist even at late times for high incident Mach numbers.
Starting Page	511
Ending Page	519
Page Count	9
File Format	PDF
ISSN	09381287
Journal	Shock Waves
Volume Number	22
Issue Number	6
e-ISSN	14322153
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-06-14
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Richtmyer–Meshkov instability Shock wave refraction Shock wave perturbation Shock tube Condensed Matter Physics Thermodynamics Fluid- and Aerodynamics Acoustics Engineering Fluid Dynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Physics and Astronomy

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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