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- Title
洋流和潮波产生的感应电磁场对比.
- Authors
刘 健; 王江涛; 王子鸣; 魏宝君
- Abstract
In order to quantitatively compute the electromagnetic fields generated by ocean current and tidal wave, the multilayer models of ocean current and tidal wave were established accordingly to describe the movements of ocean current and tidal wave. Based on the multilayer ocean current model, the analytical formulation of the stable magnetic field generated by ocean current was obtained by using the Biot-Savart law and the mirror imaging method. Based on the multilayer tidal wave model, the analytical formulism of the induced electromagnetic fields generated by tidal wave was obtained by using Maxwell equations and boundary condition of electromagnetic fields. Based on the obtained analytical formulations, the influence of the seawater̍s velocity and conductivity on the induced electromagnetic fields generated by ocean current and tidal wave were analyzed, and the influence of frequency on the induced electromagnetic fields generated by tidal wave was also analyzed and then compared with the result produced by ocean current. The computation results show that the magnitude of the seawater̍s velocity, the velocity̍s attenuation degree with ocean depth and the seawater̍s conductivity all have distinct influences on the induced electromagnetic fields generated by ocean current and tidal wave. Within the reasonable range of all the parameters, the change of velocity will have much more influence. The induced electromagnetic fields generated by tidal wave will be consistent with the results from ocean current when the frequency of tidal wave approaches 0, which cross-verifies the multilayer ocean current model and the multilayer tidal wave model in studying marine background electromagnetic fields.
- Subjects
TIDAL currents; TSUNAMIS; ELECTROMAGNETIC fields; MAXWELL equations; MIRROR images; OCEAN currents
- Publication
Journal of China University of Petroleum, 2022, Vol 46, Issue 4, p52
- ISSN
1673-5005
- Publication type
Article
- DOI
10.3969/j.issn.1673-5005.2022.04.006