Viscous Rayleigh-Taylor instability experiments at high pressure and strain rate.
Experimental results showing significant reductions from classical in the Rayleigh-Taylor instability growth rate due to high pressure effective lattice viscosity are presented. Using a laser created ramped drive, vanadium samples are compressed and accelerated quasi-isentropically at approximately 1 Mbar peak pressures, while maintaining the sample in the solid state. Comparisons with simulations and theory indicate that the high pressure, high strain rate conditions trigger a phonon drag mechanism, resulting in the observed high effective lattice viscosity and strong stabilization of the Rayleigh-Taylor instability.
Park
Hye-Sook
HS
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Lorenz
K T
KT
Cavallo
R M
RM
Pollaine
S M
SM
Prisbrey
S T
ST
Rudd
R E
RE
Becker
R C
RC
Bernier
J V
JV
Remington
B A
BA