Intrinsic rotation of toroidally confined magnetohydrodynamics
The spatiotemporal self-organization of viscoresistive magnetohydrodynamics (MHD) in a toroidal geometry is studied. Curl-free toroidal magnetic and electric fields are imposed. It is observed in our simulations that a flow is generated, which evolves from dominantly poloidal to toroidal when the Lundquist numbers are increased. It is shown that this toroidal organization of the flow is consistent with the tendency of the velocity field to align with the magnetic field. Up-down asymmetry of the geometry causes the generation of a non-zero toroidal angular momentum.
Jorge Morales, Wouter J.T. Bos, Kai Schneider, David Montgomery. Intrinsic rotation of toroidally confined magnetohydrodynamics. Physical Review Letters, American Physical Society, 2012, 109 (175002), ⟨10.1103/PhysRevLett.109.175002⟩. ⟨hal-00733093⟩
Journal: Physical Review Letters
Date de publication: 23-10-2012