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Large scale flows in transitional plane Couette flow: a key ingredient of the spot growth mechanism Large scale flows in transitional plane Couette flow: a key ingredient of the spot growth mechanism

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Academic year: 2021

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Figure

FIG. 1. Left: general sketch of the plane Couette flow set-up (a). Right: U x space-time (t,z) diagrams obtained after a water jet has perturbed the flow (see text for details)
FIG. 3. From left to right: velocity fields in the x − z plane, U x (a) and U z (b), U = 119, 4 mm.s 1 , Re = 450, y/h ≈ 0.
Fig. 4 presents premultiplied power spectra associated to U x (a) and U z (b) obtained from both types of experiments.
Fig. 5 shows U z fields at different times along a step experiment during which a turbulent front invades the laminar flow from right to left in the pictures
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