Year: 2025
Type: article
Abstract: This Letter presents a Lagrangian formulation of reduced magnetohydrodynamics (RMHD) for Alfvénic fluctuations in a uniform background magnetic field. The RMHD equations are derived in Lagrangian coordinates through the least action principle. We also demonstrate that cross helicity conservation is naturally tied to fluid element relabeling symmetry.
Source: Plasma and Fusion Research
Author: Yohei KAWAZURA
Institutions: Tohoku University, Utsunomiya University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409672075