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Figure 4 | Earth, Planets and Space

Figure 4

From: Linear stability of plane Poiseuille flow in an infinite elastic medium and volcanic tremors

Figure 4

Distribution of phase velocities in the complex plane. Red and blue lines respectively indicate the zero contour lines of the real and imaginary parts of the determinant of the 5 × 5 matrix representing the boundary conditions at x = 1. The solution, c, is represented by an intersection of red and blue lines and shown by a black dot. (a) The symmetric case where L = 20, β = 1.5,α/β= 3 , ϱ = 1, S = 10-3, δ = 0.5, and M = 0, 0.4, and 0.8. The gray shading shows the range of 0 ≤ Re(c) ≤ M. (b) Same but for the antisymmetric case. Two solutions, denoted by A and B, originating from the antisymmetric Krauklis waves are observed around Re(c) = ±1.3. Close-ups of these solutions are shown on the right-hand side.

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