Two-dimensional modeling of magnetically driven Rayleigh-Taylor instabilities in cylindrical Z pinches

被引：107

作者：

Peterson, DL ^{[1
]}

Bowers, RL ^{[1
]}

Brownell, JH ^{[1
]}

Greene, AE ^{[1
]}

McLenithan, KD ^{[1
]}

Oliphant, TA ^{[1
]}

Roderick, NF ^{[1
]}

Scannapieco, AJ ^{[1
]}

机构：

[1] UNIV NEW MEXICO, DEPT CHEM & NUCL ENGN, ALBUQUERQUE, NM 87131 USA

来源：

PHYSICS OF PLASMAS | 1996年 / 3卷 / 01期

关键词：

D O I：

10.1063/1.871862

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A two-dimensional computational methodology has been developed that uses a phenomenological representation of initial perturbations to model the evolution of magnetically driven Rayleigh-Taylor instabilities in a hollow Z pinch. The perturbed drive current waveform and x-ray output obtained from the two-dimensional models differ qualitatively from the results of unperturbed (one-dimensional) models. Furthermore, the perturbed results reproduce the principle features measured in a series of capacitor bank-driven pulsed power experiments. In this paper we discuss the computational approach and the computational sensitivity to initial conditions (including the initial perturbations). Representative examples are also presented of instability evolution during implosions, and the results are compared with experimentally measured current waveforms and visible framing camera images of perturbed implosions. Standard magnetohydrodynamic modeling, which includes instability growth in two dimensions, is found to reproduce the features seen in experiments. (C) 1996 American Institute of Physics.

引用

页码：368 / 381

页数：14

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