Structure and computation of two-dimensional incompressible extended MHD
- ISC-CNR and Politecnico di Torino, Torino (Italy). Dept. di Energia
- Université de Toulon, Marseille, (France)
- Univ. of Tokyo, Kashiwa, Chiba (Japan). Graduate School of Frontier Sciences; Mansoura Univ., Mansoura (Egypt). Physics Dept., Faculty of Science
- Univ. of Texas, Austin, TX (United States). Dept. of Physics and Inst. for Fusion Studies
A comprehensive study of the extended magnetohydrodynamic model obtained from the two-fluid theory for electrons and ions with the enforcement of quasineutrality is given. Starting from the Hamiltonian structure of the fully three-dimensional theory, a Hamiltonian two-dimensional incompressible four-field model is derived. In this way, the energy conservation along with four families of Casimir invariants is naturally obtained. The construction facilitates various limits leading to the Hamiltonian forms of Hall, inertial, and ideal MHD, with their conserved energies and Casimir invariants. Basic linear theory of the four-field model is treated, and the growth rate for collisionless reconnection is obtained. Finally, results from nonlinear simulations of collisionless tearing are presented and interpreted using, in particular, normal fields, a product of the Hamiltonian theory that gives rise to simplified equations of motion.
- Research Organization:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-04ER54742; FG02-04ER-54742
- OSTI ID:
- 1535294
- Alternate ID(s):
- OSTI ID: 1361737
- Journal Information:
- Physics of Plasmas, Vol. 24, Issue 1; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Translationally symmetric extended MHD via Hamiltonian reduction: Energy-Casimir equilibria
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journal | September 2017 |
Direction of cascades in a magnetofluid model with electron skin depth and ion sound Larmor radius scales
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journal | July 2018 |
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