The evolution of the Rayleigh-Taylor (RT) instability from intentionally three-dimensional (3D) initial conditions at an embedded, decelerating interface in a high-Reynolds number flow was discussed. The study was carried out by using ∼ 5 kJ of laser energy to produce a blast wave shocked and then decelerated the perturbed interface between the first material and lower-density C foam. It was found that the interface caused the formation of a decelerating interface with an Atwood number∼ 2/3, producing a long term positive growth rate for the RT instability. The results show that the RT spikes appear to overtake the shock waves, moving at large fraction of the predeceleration.
ASJC Scopus subject areas
- Condensed Matter Physics