Slow motion of a viscous conducting fluid past ellipsoids in the presence of a toroidal magnetic field

1970 ◽  
Vol 81 (1) ◽  
pp. 216-222
Author(s):  
S. Ghoshal
Keyword(s):  
Magnetic Field ◽  
Slow Motion ◽  
Conducting Fluid ◽  
Toroidal Magnetic Field

The secular variation of the earth's magnetic field

1966 ◽  
Vol 62 (4) ◽  
pp. 783-809 ◽  
Author(s):  
D. W. Allan ◽  
E. C. Bullard
Keyword(s):  
Magnetic Field ◽  
Secular Variation ◽  
Analytic Solution ◽  
Conducting Fluid ◽  
Toroidal Magnetic Field ◽  
Main Field ◽  
Geomagnetic Secular Variation ◽  
The Core ◽  
A Cell ◽  
The Magnetic Field

AbstractThe magnetic field observable outside a body of conducting fluid in which field is imbedded may be considerably altered by convection currents in the fluid. One possible explanation of the geomagnetic secular variation foci is that localized convection cells in the earth's core disturb the main field present. An analytic solution for such a process is readily obtained by assuming the form and dimensions for such a cell, and shows that the magnitude of the secular variation cannot easily be explained on these lines without the presence of a subsurface toroidal magnetic field of some hundreds of gauss which is ‘convected through’ the surface of the core.

Features of the Radial and Axial Distributions of the Toroidal Magnetic Field in the Axial Jet Ejection at the PF-3 Facility

2021 ◽  
Vol 47 (9) ◽  
pp. 912-937
Author(s):  
V. I. Krauz ◽  
K. N. Mitrofanov ◽  
V. V. Myalton ◽  
I. V. Il’ichev ◽  
A. M. Kharrasov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Toroidal Magnetic Field

Nonaxisymmetric Instabilities of a Toroidal Magnetic Field in a Rotating Sphere

2003 ◽  
Vol 585 (2) ◽  
pp. 1124-1137 ◽  
Author(s):  
Keke Zhang ◽  
Xinhao Liao ◽  
Gerald Schubert
Keyword(s):  
Magnetic Field ◽  
Toroidal Magnetic Field ◽  
Rotating Sphere

New Lens System Using Toroidal Magnetic Field for Intense Ion Beam

1977 ◽  
Vol 16 (3) ◽  
pp. 491-496 ◽  
Author(s):  
Akihiro Mohri ◽  
Kazunari Ikuta ◽  
Junji Fujita
Keyword(s):  
Magnetic Field ◽  
Ion Beam ◽  
Toroidal Magnetic Field ◽  
Lens System

Buckling of a Superconducting Ring in a Toroidal Magnetic Field

1979 ◽  
Vol 46 (1) ◽  
pp. 151-155 ◽  
Author(s):  
F. C. Moon
Keyword(s):  
Magnetic Field ◽  
Theoretical Model ◽  
Toroidal Magnetic Field ◽  
Magnetic Fusion ◽  
Poloidal Field ◽  
Superconducting Ring ◽  
Tokamak Reactors ◽  
Linear And Nonlinear ◽  
Mode A ◽  
Theory And Experiment

Experimental evidence and a theoretical model are presented for the magnetoelastic buckling of a rigid superconducting ring in a steady circumferential (toroidal)magnetic field. The theoretical model predicts a coupled translation and pitch displacement of the coil in the buckled mode. A discussion is given of both the linear and nonlinear magnetic perturbation forces. The experiments were conducted in liquid helium (4.2°K). The lowest natural frequency of the rigid coil on elastic springs was observed to decrease near the buckling current. Agreement between theory and experiment is fair. These results may have design implications for poloidal field coils in magnetic fusion Tokamak reactors.

scholarly journals Span-Wise Fluctuating MHD Convective Flow of a Viscoelastic Fluid through a Porous Medium in a Hot Vertical Channel with Thermal Radiation

2016 ◽  
Vol 21 (3) ◽  
pp. 667-681 ◽  
Author(s):  
K.D. Singh
Keyword(s):  
Magnetic Field ◽  
Porous Medium ◽  
Vertical Channel ◽  
Magnetic Reynolds Number ◽  
Conducting Fluid ◽  
Temperature Fields ◽  
Convection Flow ◽  
Electrically Conducting ◽  
Unsteady Mixed Convection ◽  
Phase Angles

Abstract An unsteady mixed convection flow of a visco-elastic, incompressible and electrically conducting fluid in a hot vertical channel is analyzed. The vertical channel is filled with a porous medium. The temperature of one of the channel plates is considered to be fluctuating span-wise cosinusoidally, i.e., $T^* \left( {y^* ,z^* ,t^* } \right) = T_1 + \left( {T_2} - {T_ 1} \right)\cos \left( {{{\pi z^* } \over d} - \omega ^* t^* } \right)$ . A magnetic field of uniform strength is applied perpendicular to the planes of the plates. The magnetic Reynolds number is assumed very small so that the induced magnetic field is neglected. It is also assumed that the conducting fluid is gray, absorbing/emitting radiation and non-scattering. Governing equations are solved exactly for the velocity and the temperature fields. The effects of various flow parameters on the velocity, temperature and the skin friction and the Nusselt number in terms of their amplitudes and phase angles are discussed with the help of figures.

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