Wheatley, V. and Pullin, D. I. and Samtaney, R. (2005) Stability of an impulsively accelerated density interface in magnetohydrodynamics. Physical Review Letters, 95 (12). Art. No. 125002. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:WHEprl05
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In the framework of ideal incompressible magnetohydrodynamics, we examine the stability of an impulsively accelerated, sinusoidally perturbed density interface in the presence of a magnetic field that is parallel to the acceleration. This is accomplished by analytically solving the linearized initial value problem, which is a model for the Richtmyer-Meshkov instability. We find that the initial growth rate of the interface is unaffected by the presence of a magnetic field, but for a finite magnetic field the interface amplitude asymptotes to a constant value. Thus the instability of the interface is suppressed. The interface behavior from the analytical solution is compared to the results of both linearized and nonlinear compressible numerical simulations.
|Additional Information:||©2005 The American Physical Society. Received 24 November 2004; published 14 September 2005. V.W. and D. I. P. are supported by the Academic Strategic Alliances Program of the Accelerated Strategic Computing Initiative (ASCI/ASAP) under subcontract No. B341492 of DOE Contract No. W-7405-ENG-48. R. S. was supported by USDOE Contract No. DEAC020-76-CH03073.|
|Subject Keywords:||plasma magnetohydrodynamics; plasma instability; plasma density; plasma simulation; plasma shock waves|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||09 Mar 2006|
|Last Modified:||26 Dec 2012 08:47|
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