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Fig. 21.

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Quasi-steady axisymmetric flow in the Eddington–Sweet regime when a dipolar (top row) or quadrupolar (bottom row) field is initially imposed. Panels of the first column: rotation rate normalised to the top value (colour) and poloidal field lines (black). Panels of the second column: toroidal field (colour) with the streamlines of the electrical-current function (black). Panels of the third column: norm (colour) and streamlines (black) of the total meridional circulation . Panels of the fourth column: norm (colour) and streamlines (black) of the contraction-induced meridional circulation Up = Urer + Uθeθ. The dashed lines represent an anticlockwise electrical (panels of the second column) or fluid (panels of the third and fourth columns) circulation while the solid lines correspond to a clockwise direction. The parameters are E = 10−5, Pr(N00)2 = 10−1, Pm = 102, Rec = 1, Lu = 105 and ρi/ρ0 = 20.85 (runs D28 and Q13 of Table 1).

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