3 papers
physics.plasm-ph2024
Applicability criteria of proper charge neutrality and special relativistic MHD models extended by two-fluid effects
Shuntaro Yoshino, Makoto Hirota, Yuji Hattori
The applicability of relativistic magnetohydrodynamics (RMHD) and its generalization to two-fluid models (including the Hall and inertial effects) is systematically investigated by…
physics.plasm-ph2024
Hamiltonian structure of single-helicity, incompressible magnetohydrodynamics and application to magnetorotational instability
M. Furukawa, M. Hirota
A four-field reduced model of single helicity, incompressible MHD is derived in cylindrical geometry. An appropriate set of noncanonical variables is found, and the Hamiltonian, th…
physics.flu-dyn2024
A sufficient condition for inviscid shear instability: Hurdle theorem and its application to alternating jets
Kengo Deguchi, Makoto Hirota, Timothy Dowling
We propose a simple method to identify unstable parameter regions in general inviscid unidirectional shear flow stability problems. The theory is applicable to a wide range of basi…