Nonlinear growth of the converging Richtmyer-Meshkov instability in a conventional shock tube

On divergent Richtmyer–Meshkov instability of a light/heavy interface

“…It was observed that the perturbation amplitude presents a long-term linear growth with time, which was later carefully explained by Vandenboomgaerde et al. (2018) through theoretical analysis and numerical simulation. Recently, the growth of a sinusoidal air–SF interface subjected to a cylindrically convergent shock was measured in a semiannular shock tube (Luo et al.…”

“…The convergent RMI at a single-mode heavy/light interface was realized by a gas lens technique which was originally proposed by Dimotakis & Samtaney (2006) and later extended by Vandenboomgaerde & Aymard (2011), and the experimental results exhibited great potential for studying the convergent RMI (Biamino et al 2015). It was observed that the perturbation amplitude presents a long-term linear growth with time, which was later carefully explained by Vandenboomgaerde et al (2018) through theoretical analysis and numerical simulation. Recently, the growth of a sinusoidal air-SF 6 interface subjected to a cylindrically convergent shock was measured in a semiannular shock tube (Luo et al 2015;Ding et al 2017), and the influences of the geometric convergence and RT stability on the perturbation growth were first quantified in experiments.…”

Convergent Richtmyer–Meshkov instability of heavy gas layer with perturbed inner surface

“…Gas interfaces of various shapes impacted by a cylindrical shock were then examined in this facility (Si, Zhai & Luo 2014; Zhai et al 2017; Luo et al 2018). Also, a gas-lens technique (Dimotakis & Samtaney 2006), which produces cylindrically converging shocks by letting a planar shock refract at a specially shaped gas interface, was realized in an ordinary shock tube, and the first experiments exhibited the great potential of this technique for studying the convergent RMI (Biamino et al 2015; Vandenboomgaerde et al 2018). Recently, a novel semiannular shock tube was designed by Luo et al (2015), and its semistructure was demonstrated to bring great conveniences for interface formation and flow diagnostics.…”

Convergent Richtmyer–Meshkov instability of a heavy gas layer with perturbed outer interface

“…A gas-lens technique was developed to generate cylindrical shocks in an ordinary shock tube, and the first experiments exhibited the great potential of the experimental method for studying convergent RMI (Vandenboomgaerde et al. 2018). Recently, quantitative measurements of sinusoidal interfaces subjected to a cylindrical shock were achieved in a novel semi-annular shock tube (Ding et al.…”