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Author: George Miloshevich
Requested Type: Poster
Submitted: 2018-03-01 16:00:13

Co-authors: Philip J. Morrison, E. Tassi

Contact Info:
University of Texas at Austin
2515 Speedway
Austin, Texas   78712
United States

Abstract Text:
The direction of cascades in a two-dimensional model that takes electron inertia and ion sound Larmor radius into
account is studied, resulting in analytical expressions for the absolute equilibrium states of the energy and helicities. It is
found that typically both the energy and magnetic helicity at scales shorter than electron skin depth have direct cascade,
while at large scales the helicity has an inverse cascade as established earlier for reduced magnetohydrodynamics
(MHD). It is also found that the introduction of gyro-effects allows for the existence of negative temperature (conjugate
to energy) states and the condensation of energy to the large scales. Comparisons between two- and three-dimensional
extended MHD models (MHD with two-fluid effects) show qualitative agreement between the two.