 U |  V | |
 ω = 15, n = 1 |  ω = 15, n = -1 | |
 ω = 15, n = 2 |  ω = 15, n = -2 | |
 ω = 15, n = 3 | ω = 15, n = -3 | |
 ω = 15, n = 4 |  ω = 15, n = -4 | |
 ω = 15, n = 5 |  ω = 15, n = -5 |
U | V | |
ω = 15, n = 1 | ω = 15, n = -1 | |
ω = 15, n = 2 | ω = 15, n = -2 | |
ω = 15, n = 3 | ω = 15, n = -3 | |
ω = 15, n = 4 | ω = 15, n = -4 | |
ω = 15, n = 5 | ω = 15, n = -5 |
see "Slowly Varying Modes in a Two-dimensional Duct with Shear Flow and Lined Walls", Journal of Fluid Mechanics, Volume 906, 10 January 2021