The induced electromagnetic field associated with submerged moving bodies in an unstratified conducting fluid

Madurasinghe, D.; Tuck, E. O.

doi:10.1109/48.286641

Cited by 35 publications

(13 citation statements)

References 4 publications

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“…nonlinear shallow water equations [1][2][3][4]. When breaking and inundation are involved, Navier-Stokes [ [23][24][25]. Given that the accuracy of a modern airborne superconducting quantum interference device magnetic transducer is of the order of 10 −6 nT, such weak magnetic fields can, in principle, be detected.…”

Section: Introductionmentioning

confidence: 99%

Space–time behaviour of magnetic anomalies induced by tsunami waves in open ocean

Wang

Liu

2013

Proc. R. Soc. A.

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The magnetic anomaly induced by an inhomogeneous velocity field under tsunami waves in open ocean is investigated. With asymptotical analysis, an explicit series solution of the kinematic dynamo problem is established for weak dispersive water waves. The magnetic field induced by typical tsunami models, including single wave and N -wave, can be directly obtained using the proposed series solution. The characteristics of the magnetic field induced by two realistic tsunami events are investigated. By analysis, the magnetic magnitude induced by a 1 m high tsunami is estimated as of the order of 10 nT at the sea surface, which depends on the wave parameters as well as the Earth's magnetic field. The space and time behaviour of the magnetic field shows fair similarity with the field data at Easter Island during the 2010 Chile tsunami.

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Section: Introductionmentioning

confidence: 99%

Space–time behaviour of magnetic anomalies induced by tsunami waves in open ocean

Wang

Liu

2013

Proc. R. Soc. A.

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“…Notice that the latest equation in the set of Eqs. (11) has been rearranged using the equation f = k 2 f . The set of Eqs.…”

Section: Basic Equationsmentioning

confidence: 99%

“…It is usually the case that numerical simulation is used to analyze such kind of problem [11][12][13][14]. The exact solution of the problem has been obtained by Surkov et al [15] for the case of laminar fluid flow around a dielectric ball moving in infinite conductive fluid space.…”

Section: Introductionmentioning

confidence: 99%

Perturbations of Ambient Magnetic Field Resulted From a Ball Motion in a Conductive Liquid Half-Space

Сурков¹,

Сорокин²,

Yashchenko³

2018

PIER B

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Abstract-We theoretically analyze perturbations of ambient magnetic field due to electric currents caused by motion of a dielectric ball in a conductive fluid half-space. The approximate analytical solution of the problem has been derived for the case of arbitrary orientation of the ambient magnetic field and under the requirement that the fluid flow around the ball is laminar and potential in character. We examine spatiotemporal distribution of these perturbations and their dependence on both the depth and distance from the moving ball. Amplitudes of electromagnetic perturbations generated by the fluid flow around the ball have been compared with that resulting from gravity waves in the fluid.

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“…Zou and Arye [16] studied the detection method of wake-induced magnetic fields based on using airborne magnetic transduces. Yaakobi and Zilman [17,18] and Madurasinghe and Tuck [19] considered detection issues of magnetic fields originated from wakes of vessels moving on ocean surface or submerged in a depth.…”

Section: Introductionmentioning

confidence: 99%

MAGNETIC FIELD INDUCED BY WAKE OF MOVING BODY IN WIND WAVES (Invited Paper)

Zhu¹,

Xia²

2014

PIER

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Abstract-A general procedure to evaluate the electromagnetic fields generated by moving seawater through the geomagnetic field is proposed. It contains two essential steps: modeling of velocity vector of seawater according to its dynamic mechanism, and solution of Maxwell equations under a stratified ocean configuration. Two kinds of motions are considered in this work, wind-driven waves and wakes due to a moving body. The ocean is taken to be infinitely deep at the moment. Both the velocity vector and magnetic field are expressed as superposition of sinusoidal waves. Simulation results show that the magnetic fields produced by moderate wind waves or a typical size body moving at moderate speed are on the order of a few hundred pico-Tesla near the sea level. The spectrum characteristics of the two kind magnetic anomalies are distinct.

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The induced electromagnetic field associated with submerged moving bodies in an unstratified conducting fluid

Cited by 35 publications

References 4 publications

Space–time behaviour of magnetic anomalies induced by tsunami waves in open ocean

Space–time behaviour of magnetic anomalies induced by tsunami waves in open ocean

Perturbations of Ambient Magnetic Field Resulted From a Ball Motion in a Conductive Liquid Half-Space

MAGNETIC FIELD INDUCED BY WAKE OF MOVING BODY IN WIND WAVES (Invited Paper)

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