Flow and magnetic structures in a kinematic ABC-dynamo

作     者：Tao Zhang ZhiLiang Lin ChenYang Huang Alistair G.L.Borthwick Tao Zhang;ZhiLiang Lin;ChenYang Huang;Alistair G.L.Borthwick

作者机构：State Key Laboratory of Ocean EngineeringSchool of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationShanghai 200240China School of EngineeringThe University of EdinburghEdinburgh EH93JLUK 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2020年第63卷第8期

页      面：95-100页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.51979162) 

主　　题：kinematic dynamo theory ABC-flow Lagrangian coherent structure 

摘      要：Dynamo theory describes the magnetic field induced by the rotating,convecting and electrically conducting fluid in a celestial *** classical ABC-flow model represents fast dynamo action,required to sustain such a magnetic *** this letter,Lagrangian coherent structures(LCSs)in the ABC-flow are detected through Finite-time Lyapunov exponents(FTLE).The flow skeleton is identified by extracting intersections between repelling and attracting *** the case A=B=C=1,the skeleton structures are made up from lines connecting two different types of stagnation points in the *** corresponding kinematic ABC-dynamo problem is solved using a spectral method,and the distribution of cigar-like magnetic structures *** links are found to exist between LCSs in the ABC-flow and induced magnetic structures,which provides insight into the mechanism behind the ABC-dynamo.