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Phys. Rev. E 62, 5594–5602 (2000)

Conservation of circulation in magnetohydrodynamics

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Jacob D. Bekenstein* and Asaf Oron
The Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel

Received 31 January 2000; published in the issue dated October 2000

We demonstrate at both the Newtonian and (general) relativistic levels the existence of a generalization of Kelvin’s circulation theorem (for pure fluids) that is applicable to perfect magnetohydrodynamics. The argument is based on the least action principle for magnetohydrodynamic flow. Examples of the new conservation law are furnished. The new theorem should be helpful in identifying new kinds of vortex phenomena distinct from magnetic ropes or fluid vortices.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.62.5594
DOI:
10.1103/PhysRevE.62.5594
PACS:
95.30.Qd, 52.65.Kj, 52.30.-q, 95.30.Sf

*Electronic address: bekenste@vms.huji.ac.il

Electronic address: asafo@alf.fiz.huji.ac.il