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Structure of turbulent shear flows - A new look

Roshko, Anatol (1976) Structure of turbulent shear flows - A new look. In: AIAA 14th Aerospace Science Meeting, January 26-28, 1976, Washington, DC.

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For many years experimental research in turbulence was devoted to the measurement of various correlations and special functions which had evolved from the statistical theories and from engineering computing methods based on the hierarchy of Reynolds equations. A recent change in direction toward a more deterministic description of turbulent structure has been initiated by the discovery of large coherent structures in several turbulent shear flows. The new point of view suggests that with every shear flow (jet, boundary layer, mixing layer, etc.) is associated an identifiable, characteristic structure; the development of the flow is controlled by the interactions of these structures with each other. An understanding of their properties should give insight into actual physical processes in turbulent flows, such as entrainment, transport, mixing, noise production, gustiness, etc. and should lead to improved methods for analyzing and computing them. Experiments designed to study these properties are aided by recent developments in instrumentation technology such as computer-aided control of the experiments, but the venerable technique of flow visualization is still an indispensable aid.

Item Type:Conference or Workshop Item (Lecture)
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Alternate Title:Dryden Lecture
Additional Information:© 1976 AIAA. I am indebted for valuable discussions and use of material to many colleagues and students, especially G. L. Brown, J. Konrad and L. Bernal. Names of others are indicated by an asterisk in the list of references. Much of the material in this lecture is based on research supported by the Office of Naval Research under its Fluid Dynamics Program and Project SQUID.
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Office of Naval Research (ONR)UNSPECIFIED
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AIAA Paper76-78
Record Number:CaltechAUTHORS:20141222-105100548
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Official Citation:Structure of turbulent shear flows - A new look A. ROSHKO 14th Aerospace Sciences Meeting, 1976, 10.2514/6.1976-78
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53085
Deposited By: George Porter
Deposited On:22 Dec 2014 19:19
Last Modified:10 Nov 2021 19:47

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