FSLE and FTLE fields for the flow (6) , with initial time and transition between and . (a) FSLE field for . (b) FTLE field for T = 1.
(a) Lines of discontinuities in the FSLE field of the autonomous double gyre flow (7) . (b) A cross section of the discontinuities along the line. (c) The root cause of the jump-discontinuity at : a tangency of the particle-separation history curve with the r = 6 horizontal line.
Instantaneous velocity field for the moving separation flow (8) .
An FSLE ridge with large height-variation that does not correspond to an FTLE ridge. (a) and (b) FSLE and separation time distribution for the moving separation flow (8) with separation factor . Note that the whole of the x 1 axis is a ridge for the FSLE field (a), as confirmed by the separation time field (b). (c) and (d) The FTLE fields for the integration times and admit a trench along most of the x 1 axis.
The separation time distribution for the moving separation flow (8) with separation factor .
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