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The uses of coherent structure (Dryden Lecture)

Coles, Donald (1985) The uses of coherent structure (Dryden Lecture). In: AIAA 23rd Aerospace Sciences Meeting, January 14-17, 1985, Reno, NV.

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The concept of coherent structure in turbulent flow is a revolutionary idea which is being developed by evolutionary means. The main objective of this review is to list some solid achievements, showing what can be done by using the concept of coherent structure that cannot be done without it. The nature of structure is described in terms of some related concepts, including celerity, topology, and the phenomenon of coalescence and splitting of structure. The main emphasis is on the mixing layer, as the one flow whose structure is well enough understood so that technical applications are now being made in problems of mixing and chemistry. An attempt is made to identify some conceptual and experimental obstacles that stand in the way of progress in other technically important flows, particularly the turbulent boundary layer. A few comments are included about the role of structure in numerical simulations and in current work on manipulation and control of turbulent flow. Some recent developments are cited which suggest that the time is nearly right for corresponding advances to occur in turbulence modeling.

Item Type:Conference or Workshop Item (Lecture)
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Additional Information:© 1985 AIAA. Preparation of this paper was supported in part by the National Science Foundation under Grant MEA-8315042. I have benefited from discussions with several of my colleagues, especially Gene Broadwell, Hans Liepmann, and Anatol Roshko.
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AIAA Paper85-0506
Record Number:CaltechAUTHORS:20141210-131347636
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Official Citation:The uses of coherent structure (Dryden Lecture) D. COLES 23rd Aerospace Sciences Meeting, 1985, 10.2514/6.1985-506
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52555
Deposited By: George Porter
Deposited On:10 Dec 2014 21:57
Last Modified:10 Nov 2021 19:42

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