Action principles for relativistic extended magnetohydrodynamics: A unified theory of magnetofluid models

Yohei Kawazura, George Miloshevich, Philip J. Morrison

研究成果: Article査読

14 被引用数 (Scopus)

抄録

Two types of Eulerian action principles for relativistic extended magnetohydrodynamics (MHD) are formulated. With the first, the action is extremized under the constraints of density, entropy, and Lagrangian label conservation, which leads to a Clebsch representation for a generalized momentum and a generalized vector potential. The second action arises upon transformation to physical field variables, giving rise to a covariant bracket action principle, i.e., a variational principle in which constrained variations are generated by a degenerate Poisson bracket. Upon taking appropriate limits, the action principles lead to relativistic Hall MHD and well-known relativistic ideal MHD. For the first time, the Hamiltonian formulation of relativistic Hall MHD with electron thermal inertia (akin to Comisso et al., Phys. Rev. Lett. 113, 045001 (2014) for the electron-positron plasma) is introduced. This thermal inertia effect allows for violation of the frozen-in magnetic flux condition in marked contrast to nonrelativistic Hall MHD that does satisfy the frozen-in condition. We also find the violation of the frozen-in condition is accompanied by freezing-in of an alternative flux determined by a generalized vector potential. Finally, we derive a more general 3 + 1 Poisson bracket for nonrelativistic extended MHD, one that does not assume smallness of the electron ion mass ratio.

本文言語English
論文番号022103
ジャーナルPhysics of Plasmas
24
2
DOI
出版ステータスPublished - 2017 2 1
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学

フィンガープリント

「Action principles for relativistic extended magnetohydrodynamics: A unified theory of magnetofluid models」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル