A KINEMATIC MAGNETIC DYNAMO SUSTAINED BY A BELTRAMI FLOW IN A SPHERE

被引：16
|
作者：
ZHELIGOVSKY, VA [1 ]
机构：
[1] OBSERV COTE DAZUR,CNRS,URA 1362,F-06304 NICE 4,FRANCE
来源：
GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS | 1993年 / 73卷 / 1-4期
关键词：
BELTRAMI FLOW; SPHERE; FAST KINEMATIC DYNAMO; MAGNETIC INDUCTION OPERATOR; TEMPORAL GROWTH RATES; MAGNETIC EIGENMODES;
D O I：
10.1080/03091929308203629
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
General features of Beltrami vector fields in a sphere are discussed. Numerical solutions of the kinematic dynamo problem of magnetic fields generation by a Beltrami flow of conducting fluid in a sphere are presented. The Beltrami flow chosen for simulations is chaotic. Maximal temporal growth rates of magnetic field are obtained for magnetic Reynolds numbers R(m) up to 200, together with associated magnetic eigenmodes for R(m) less-than-or-equal-to 100. Their behavior suggests that the dynamo under consideration is fast.
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页码：217 / 254
页数：38
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