RT journal article
T1 Vortex-magnetic competition and regime transitions in antiparallel flux tubes
A1 Weiyu, Shen
A1 Ostilla Monico, Rodolfo
A1 Zhu, Xiaojue
A2 Ingeniería Mecánica y Diseño Industrial
K1 vortex dynamics
K1 MHD turbulence
K1 vortex interactions
AB Vortex–magnetic interactions shape magnetohydrodynamic (MHD) turbulence, influencingenergy transfer in astrophysical, geophysical and industrial systems. In the solaratmosphere, granular-scale vortex flows couple strongly with magnetic fields, channellingenergy into the corona. At high Reynolds numbers, vorticity and magnetic fields are nearlyfrozen into the charged fluid, and MHD flows emerge from the Lorentz force mediatedinteractions between coherent vortex structures in matter and the field. To probe thiscompetition in a controlled setting, we revisit the canonical problem of two antiparallelflux tubes. By varying the magnetic flux threading each tube – and thus sweeping theinteraction parameter Ni , which gauges Lorentz-to-inertial force balance – we uncoverthree distinct regimes: vortex-dominated joint reconnection, instability-triggered cascade,and Lorentz-induced vortex disruption. At low Ni , classical vortex dynamics dominates,driving joint vortex–magnetic reconnection, and amplifying magnetic energy via adynamo effect. At moderate Ni , the system oscillates between vorticity-driven attractionand magnetic damping, triggering instabilities and nonlinear interactions that spawnsecondary filaments and drive an energy cascade. At high Ni , Lorentz forces suppressvortex interactions, aligning the tubes axially while disrupting vortex cores and rapidlyconverting magnetic to kinetic energy. These findings reveal how the inertial–Lorentzbalance governs energy transfer and coherent structure formation in MHD turbulence,offering insight into vortex–magnetic co-evolution in astrophysical plasmas.
PB Cambridge University Press
SN 1469-7645
YR 2025
FD 2025-10-27
LK http://hdl.handle.net/10498/39324
UL http://hdl.handle.net/10498/39324
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-may-2026