DocumentCode :
2027268
Title :
Three-dimensional Rayleigh-Taylor instability in Saturn z-pinch implosions: a study with MACH3
Author :
Peterkin, R.E. ; Roderick, N.F. ; Shumlak, U. ; Hussey, T.W. ; Speilman, R.B.
Author_Institution :
Phillips Lab., Kirtland AFB, NM, USA
fYear :
1995
fDate :
5-8 June 1995
Firstpage :
93
Abstract :
Summary form only given. A new portable parallel physics simulation code, called MACH3 (multiblock arbitrary coordinate hydrodynamics code in three spatial dimensions), has been developed by the Phillips Laboratory for performing three dimensional collisional plasma simulations. This code is based on the widely-used and useful two-dimensional code, MACH2. Both are arbitrary Lagrangian Eulerian codes with sophisticated physics and numerical models to allow the user great flexibility in solving non-ideal magnetohydrodynamic (MHD) problems. A preliminary series of calculations has been performed to investigate three-dimensional effects in an imploding annular plasma gas puff driven by the Saturn pulsed power generator at Sandia. Plasma instabilities are seeded by an initial periodic density perturbation in the azimuthal direction, with a random component in the r-z plane. Results show the interaction between the r-z plane and the r-/spl thetav/ plane modes and their effect on the sheath dynamics during the /spl sim/65 ns implosion. Comparison between calculations using MACH2 and MACH3 show the degree of applicability of the premise of the dominance of r-z plane growth usually made to justify 2-dimensional simulations.
Keywords :
Rayleigh-Taylor instability; Z pinch; explosions; physics computing; plasma instability; plasma magnetohydrodynamics; plasma sheaths; plasma simulation; 2-dimensional simulations; 65 ns; MACH3; Rayleigh-Taylor instability; Saturn z-pinch implosions; arbitrary Lagrangian Eulerian codes; azimuthal direction; imploding annular plasma gas puff; implosion; initial periodic density perturbation; multiblock arbitrary coordinate hydrodynamics code in three spatial dimensions; nonideal magnetohydrodynamic problems; plasma instabilities; portable parallel physics simulation code; pulsed power generator; r-/spl thetav/ plane modes; r-z plane; random component; sheath dynamics; three dimensional collisional plasma simulations; three-dimensional effects; Hydrodynamics; Laboratories; Lagrangian functions; Magnetohydrodynamic power generation; Numerical models; Physics; Plasma density; Plasma simulation; Power generation; Saturn;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 1995. IEEE Conference Record - Abstracts., 1995 IEEE International Conference on
Conference_Location :
Madison, WI, USA
ISSN :
0730-9244
Print_ISBN :
0-7803-2669-5
Type :
conf
DOI :
10.1109/PLASMA.1995.529653
Filename :
529653
Link To Document :
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