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Fig. 20

Differentially rotating flow with Ω0 = 55,q = 2,cs = 100,N2 ≈ 104 winds up Bφ from a weak poloidal field of the form of Eq. (8). After about 15 rotations, the forcing term starts to operate, slowing down the flow to a rigid rotation with Ωf = 0.03Ω0 which leads to instability.
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