Low-dimensional models for the turbulent wall layer display an intermittent phenomenon with an ejection phase and a sweep phase that strongly resembles the bursting phenomenon observed in experimental flows. The probability distribution of inter-burst times has the observed shape [E. Stone and P. J. Holmes, Physica D 37, 20 (1989); SIAM J. Appl. Math. 50, 726 (1990); Phys. Lett. A 5, 29 (1991); P. J. Holmes and E. Stone, in Studies in Turbulence, edited by T. B. Gatski, S. Sarkar, and C. G. Speziale (Springer, Heidelberg, 1992)]. However, the time scales both for bursts and interburst durations are unrealistically long, a fact that was not appreciated until recently. We believe that the long time scales are due to the model’s inclusion of only a single coherent structure, when in fact a succession of quasi-independent structures are being swept past the sensor in an experiment. A simple statistical model of this situation restores the magnitude of the observed bursting period, although there is a great deal of flexibility in the various parameters involved.
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February 1997
Research Article|
February 01 1997
Lagrangian and Eulerian view of the bursting period
Bérengère Podvin;
Bérengère Podvin
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853
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John Gibson;
John Gibson
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853
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Gal Berkooz;
Gal Berkooz
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853
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John Lumley
John Lumley
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853
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Physics of Fluids 9, 433–437 (1997)
Article history
Received:
June 24 1996
Accepted:
October 08 1996
Citation
Bérengère Podvin, John Gibson, Gal Berkooz, John Lumley; Lagrangian and Eulerian view of the bursting period. Physics of Fluids 1 February 1997; 9 (2): 433–437. https://doi.org/10.1063/1.869137
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