Algorithm and exploratory study of the Hall MHD Rayleigh-Taylor instability.

Gardiner, Thomas Anthony

关键词: ALGORITHMS;    BUBBLE GROWTH;    ELECTRONS;    INSTABILITY;    MAGNETOHYDRODYNAMICS;    PLASMA;    RAYLEIGH-TAYLOR INSTABILITY;    TESTING;    WHISTLERS;   

DOI  :  10.2172/1008118
RP-ID  :  SAND2010-6747
PID  :  OSTI ID: 1008118
Others  :  TRN: US1101804

学科分类：凝聚态物理

美国|英语

来源: SciTech Connect

【 摘 要 】

This report is concerned with the influence of the Hall term on the nonlinear evolution of the Rayleigh-Taylor (RT) instability. This begins with a review of the magnetohydrodynamic (MHD) equations including the Hall term and the wave modes which are present in the system on time scales short enough that the plasma can be approximated as being stationary. In this limit one obtains what are known as the electron MHD (EMHD) equations which support two characteristic wave modes known as the whistler and Hall drift modes. Each of these modes is considered in some detail in order to draw attention to their key features. This analysis also serves to provide a background for testing the numerical algorithms used in this work. The numerical methods are briefly described and the EMHD solver is then tested for the evolution of whistler and Hall drift modes. These methods are then applied to study the nonlinear evolution of the MHD RT instability with and without the Hall term for two different configurations. The influence of the Hall term on the mixing and bubble growth rate are analyzed.