Three-dimensional simulations of shear instabilities in magnetized flows

被引：13

作者：

Brüggen, M

Hillebrandt, W

机构：

[1] Max Planck Inst Astrophys, D-85740 Garching, Germany

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[3] Univ Cambridge Churchhill Coll, Cambridge CB3 0DS, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2001年 / 323卷 / 01期

关键词：

hydrodynamics; instabilities; magnetic fields; stars : interiors; stars : magnetic fields;

D O I：

10.1046/j.1365-8711.2001.04206.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Shear mixing is believed to be the main mechanism to provide extra mixing in stellar interiors. We present results of three-dimensional (3D) simulations of the magnetohydrodynamic Kelvin-Helmholtz instability in a stratified shear layer. The magnetic field is taken to be uniform and parallel to the shear flow. We describe the evolution of the fluid flow and the magnetic field for a range of initial conditions. In particular, we investigate how the mixing late of the fluid depends on the Richardson number and the magnetic field strength. It is found that the magnetic field can enhance as well as suppress mixing. Moreover, we have performed two-dimensional (2D) simulations and discuss some interesting differences between the 2D and 3D results.

引用

页码：56 / 66

页数：11

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