| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Numerical Simulation of Anisotropic Preheating Ablative Rayleigh-Taylor Instability |
| WANG Li-Feng1,4, YE Wen-Hua2,3,1, LI Ying-Jun4 |
| 1Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 1000882Department of Physics, Zhejiang University, Hangzhou 3100283Center for Applied Physics and Technology, Peking University, Beijing 1008714State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology, Beijing 100083 |
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| Cite this article: |
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WANG Li-Feng, YE Wen-Hua, LI Ying-Jun 2010 Chin. Phys. Lett. 27 025202 |
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Abstract The linear growth rate of the anisotropic preheating ablative Rayleigh-Taylor instability (ARTI) is studied by numerical simulations. The preheating model κ (T)=κSH [1+f(T)] is applied, where f(T) is the preheating function interpreting the preheating tongue effect in the cold plasma ahead of the ablative front. An arbitrary coefficient D is introduced in the energy equation to study the influence of transverse thermal conductivity on the growth of the ARTI. We find that enhancing diffusion in a plane transverse to the mean longitudinal flow can strongly reduce the growth of the instability. Numerical simulations exhibit a significant stabilization of the ablation front by improving the transverse thermal conduction. Our results are in general agreement with the theory analysis and numerical simulations by Masse [Phys. Rev. Lett. 98 (2007) 245001].
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| Keywords:
52.57.Fg
52.35.Py
47.20.Ma
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Received: 19 August 2009
Published: 08 February 2010
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| PACS: |
52.57.Fg
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(Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))
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52.35.Py
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(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
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47.20.Ma
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(Interfacial instabilities (e.g., Rayleigh-Taylor))
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