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  5. Unstable periodic orbits and heteroclinic connections in plane Couette flow

Unstable periodic orbits and heteroclinic connections in plane Couette flow

File(s)
GibsonGFM08mpg1final.mpg (33.36 MB)
Gibson GFM 08 entry, final version, MPEG-1
GibsonGFM08mpg2final.mpg (117.56 MB)
Gibson GFM 08 entry, final version, MPEG-2
Permanent Link(s)
https://hdl.handle.net/1813/11491
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Fluid Dynamics Videos
Author
Gibson, John F.
Cvitanovic, Predrag
Abstract

Equilibrium, traveling wave, and periodic orbit solutions of pipe, channel, and plane Couette flows can now be computed precisely at Reynolds numbers above the onset of turbulence. These invariant solutions capture the complex dynamics of wall-bounded rolls and streaks and provide a framework for understanding low-Reynolds turbulent shear flows as dynamical systems. We present fluid dynamics videos of plane Couette flow illustrating periodic orbits, a close pass of turbulent flow to a periodic orbit, and heteroclinic connections between unstable equilibria.

Date Issued
2008-10-10T20:46:02Z
Keywords
periodic orbit
•
heteroclinic connection
•
plane Couette flow

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