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Abstract: The spontaneous self-organization of two-dimensional magnetized plasma isinvestigated within the framework of magnetohydrodynamics with a particularemphasis on the symmetry-breaking induced by the shape of the confiningboundaries. This symmetry-breaking is quantified by the angular momentum, whichis shown to be generated rapidly and spontaneously from initial conditions freefrom angular momentum as soon as the geometry lacks axisymmetry. This effect isillustrated by considering circular, square, and elliptical boundaries. It isshown that the generation of angular momentum in nonaxisymmetric geometries canbe enhanced by increasing the magnetic pressure. The effect becomes stronger athigher Reynolds numbers. The generation of magnetic angular momentum orangular field, previously observed at low Reynolds numbers, becomes weaker atlarger Reynolds numbers.



Author: Wouter Bos LMFA, Salah Neffaa M2P2, Kai Schneider M2P2

Source: https://arxiv.org/







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