Citation:
M. Hahn, D. Drikakis, D. L. Youngs, and R. J. R. Williams. Richtmyer-Meshkov turbulent mixing arising from an inclined material interface
with realistic surface perturbations and reshocked flow. Physics of Fluids, 2011, Volume 23, 046101
Abstract:
This paper presents a numerical study of turbulent mixing due to the interaction
of a shock wave with an inclined material interface. The interface between the
two gases is modeled by geometrical random multimode perturbations represented
by different surface perturbation power spectra with the same standard
deviation. Simulations of the Richtmyer-Meshkov instability and associated
turbulent mixing have been performed using high-resolution implicit large eddy
simulations. Qualitative comparisons with experimental flow visualizations are
presented. The key integral properties have been examined for different
interface perturbations. It is shown that turbulent mixing is reduced when the
initial perturbations are concentrated at short wavelengths. The form of the
initial perturbation has strong effects on the development of small-scale flow
structures, but this effect is diminished at late times.
