Objective vortex detection in an astrophysical dynamo
Objective vortex detection in an astrophysical dynamo
复制标题
天体物理发电机中的客观涡流检测
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
G. Haller
中科院分区:
文献类型:
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作者:
E. Rempel;A. Chian;A. Chian;F. Beron;S. Szanyi;G. Haller
A novel technique for detecting Lagrangian vortices is applied to a helical magnetohydrodynamic dynamo simulation. The vortices are given by tubular level surfaces of the Lagrangian averaged vorticity deviation, the trajectory integral of the normed difference of the vorticity from its spatial mean. This simple method is objective, i.e. invariant under time-dependent rotations and translations of the coordinate frame. We also adapt the technique to use it on magnetic fields and propose the method of integrated averaged current deviation to determine precisely the boundary of magnetic vortices. The relevance of the results for the study of vortices in solar plasmas is discussed.
DOI:
10.1088/0004-637x/786/1/51
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
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作者:
Chian A
通讯作者:
Chian A