Bifurcation in viscoresistive MHD: The Hartmann number and the reversed field pinch

被引：99

作者：

Cappello, S

Escande, DF

机构：

[1] Consorzio RFX, I-35127 Padua, Italy

[2] CNR, I-00185 Rome, Italy

[3] Univ Aix Marseille 1, UMR 6633 CNRS, F-13397 Marseille, France

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.85.3838

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A scaling approach to the simplest viscoresistive MI-ID model reveals that the Prandtl number acts only through the inertia term. When this term is negligible the dynamics is ruled by the Hartmann number H only. This occurs for the reversed field pinch dynamics as seen by numerical simulation of the model. When H is large the system is in a multiple helicity state. In the vicinity of H = 2500 the system displays temporal intermittency with laminar phases of quasi-single-helicity (SH) type. For lower H's two basins of SH are shown to coexist. SH regimes are of interest because of their nonchaotic magnetic field.

引用

页码：3838 / 3841

页数：4

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