The RT instability in cylindrical implosion of a jelly ring

The interfacial RT instability experiments on imploding jelly liners in cylindrically convergent geometry have been performed. The liner´s instability growth was observed clearly with a high-speed framing camera. Jelly liners had different initial perturbation forms on their inner and outer interfaces, smooth one or sinusoidal one. The initial perturbations also had different magnitude and spatial frequency (for example, mode n=5, 10, 20). The experimental results show that the growth and coupling of perturbations on inner and outer surface are remarkably different. Meanwhile, the relevant 2D numerical simulation of hydrodynamics combined with Level Set method has been performed.