Finite lifetime of turbulence in shear flows

Björn Hof (), Jerry Westerweel, Tobias M. Schneider and Bruno Eckhardt
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Björn Hof: The University of Manchester
Jerry Westerweel: Delft University of Technology
Tobias M. Schneider: Fachbereich Physik, Philipps-Universität Marburg
Bruno Eckhardt: Fachbereich Physik, Philipps-Universität Marburg

Nature, 2006, vol. 443, issue 7107, 59-62

Abstract: Turbulence times Most flows in nature are turbulent, such as flows in the atmosphere, the oceans, in the cores of planets and around vehicles. The commonly accepted view is that if a (steadily driven) flow becomes turbulent, it stays in this state indefinitely. New work on a system with many parallels in nature, a fluid flowing through straight pipes and channels, has come up with a surprise result: turbulence decays after a finite time. Though finite, the lifetime increases rapidly with flow rate, and even at moderate speeds can reach unobservably long timescales. Nevertheless, this discovery could be exploited to control turbulent flows.

Date: 2006
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DOI: 10.1038/nature05089

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