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Fig. 4.

image

Examples of eigenmodes at (a, b) (kx, kz) = (0.445, 0) for the inflectional instability (triangle in Fig. 3) and (c, d) (kx, kz) = (0, 5) for the inertial instability (square in Fig. 3). Panels a and c: mode shapes of and (blue: real part, red: imaginary part, black: absolute value), respectively. Panels b and d: perturbations and in the physical space, respectively.

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