Dynamic stabilization of Rayleigh-Taylor instability in ablation fronts

Dynamic stabilization of Rayleigh-Taylor instability in ablation fronts

Mitigation of Rayleigh Taylor instability (RTI) in an ablation front is of great importance in inertial confinement fusion (ICF). Specially for ICF directly driven by ion beams since in this case the resulting cut-off wave number k c above which the front becomes stable, may be considerably large as a consequence of the relatively small fraction of the beam energy that is transported by thermal...

Granular Rayleigh-Taylor instability

A granular instability driven by gravity is studied experimentally and numerically. The instability arises as grains fall in a closed Hele-Shaw cell where a layer of dense granular material is positioned above a layer of air. The initially flat front defined by the grains subsequently develops into a pattern of falling granular fingers separated by rising bubbles of air. A transient coarsening ...

numerical simulation of rayleigh-taylor instability

rayleigh-taylor (rt) instability has a growing importance in many fields including aircraft industry and astrophysics. the development and the growth of rt instability were investigated using sinusoidal disturbances with different wavelength at the interface of two fluids. numerical simulations were performed by solving navier-stokes unsteady equations with the vof formulation. results of the 2...

Self-consistent numerical dispersion relation of the ablative Rayleigh-Taylor instability of double ablation fronts in inertial confinement fusion

The linear stability analysis of accelerated double ablation fronts is carried out numerically with a self-consistent approach. Accurate hydrodynamic profiles are taken into account in the theoretical model by means of a fitting parameters method using 1D simulation results. Numerical dispersion relation is compared to an analytical sharp boundary model [Yañez et al., Phys. Plasmas 18, 052701 (...

The Rotating Rayleigh-Taylor Instability