Modelling of electromagnetic wakes of moving submerged bodies in stratified sea water

Author

Chaillout, J.J. ; Berthier, J. ; Blanpain, R.

Author_Institution

CEA, Centre d´´Etudes Nucleaires de Grenoble, France

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

998

Lastpage

1001

Abstract

Moving submerged bodies create wakes behind them. The motion of the sea water, because of its conductivity, induces an electromagnetic perturbation (b&oarr;, e&oarr;) in the Earth magnetic field B&oarr;_T. In this paper, we propose a numerical modelling of this perturbation. The water velocity field V(x,y,z) is first computed in two different cases: turbulent wake obtained using a finite volume method, wave field by a perturbation method. Then, the corresponding electromagnetic perturbation is obtained by solving the Maxwell equations including the Lorentz term. For that, we use a finite element method

Keywords

Maxwell equations; electromagnetic induction; finite element analysis; geomagnetism; perturbation techniques; seawater; target tracking; turbulence; wakes; Earth magnetic field; Lorentz term; Maxwell equations; conductivity; electromagnetic perturbation; electromagnetic wakes; finite element method; finite volume method; moving submerged bodies; perturbation method; stratified sea water; turbulent wake; water velocity field; wave field; Conductivity; Earth; Electromagnetic fields; Electromagnetic modeling; Finite element methods; Finite volume methods; Magnetic fields; Maxwell equations; Numerical models; Perturbation methods;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497408

Filename

497408