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Nonaxisymmetric linear instability of cylindrical magnetohydrodynamic Taylor-Couette flow

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FIG. 2. (Color online) Instability curves for purely azimuthal magnetic fields at Pm = 10−6, where µΩ = 0.26, δ = 0, m = 1,with contours taken as log10γ, showing the effect of changing positive τ: a) τ = 0, b) τ = 0.4, and c) τ = 100
FIG. 4. (Color online) Eigenmodes for Re = 104 and Ha =102.5 in Fig. 3 b) and d), showing the azimuthal velocity ina meridional cross section of the cylinder
FIG. 5. (Color online) The Pm = 10−mregime, however as6 analog of the weak instability seen at Pm = 1, and its dependence on µΩ, where τ = 0.5, = 1, δ = 0, and a) µΩ = 0.3975, b) µΩ = 0.4, c) µΩ = 0.4025
FIG. 6. (Color online) Instability curves for helical magnetic fields at Pm = 10−there is little difference between the helical and toroidal magnetic fields, however as the field becomes more axially dominatedstabilising effect of the poloidal field at6, with co
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