Numerical investigation on the ablative Kelvin-Helmholtz instabilityL. F. Wang1, 2, W. H. Ye3, 4, 1 and Y. J. Li2
1 Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics Beijing 100088, China
2 School of Mechanics and Civil Engineering, China University of Mining and Technology - Beijing 100083, China
3 Department of Physics, Zhejiang University - Hangzhou 310027, China
4 Center for Applied Physics and Technology, Peking University - Beijing 100871, China
received 29 June 2009; accepted in final form 25 August 2009; published September 2009
published online 22 September 2009
The ablative effect on the Kelvin-Helmholtz instability is attemptly analyzed by numerical simulation. One-dimensional ablative effect is analyzed and some typical profiles are introduced for the two-dimensional simulations. We found that the linear growth rate and frequency are reduced by the ablative effect. The heat conduction stabilize the Kelvin-Helmholtz instability by suppressing the growth and transmission of the perturbation. In the weakly nonlinear regime, the ablative effect suppresses the appearance and growth of the second and third harmonics.
47.20.Ft - Instability of shear flows (e.g., Kelvin-Helmholtz).
52.35.Py - Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.).
52.57.Fg - Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.).
© EPLA 2009