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On the Use of Lagrangian Variables in Descriptions of Unsteady Boundary-Layer Separation

Cowley, Stephen J. and Van Dommelen, Leon L. and Lam, Shui T. (1990) On the Use of Lagrangian Variables in Descriptions of Unsteady Boundary-Layer Separation. Philosophical Transactions: Physical Sciences and Engineering, 333 (1631). pp. 343-378. ISSN 0962-8428. https://resolver.caltech.edu/CaltechAUTHORS:20141217-152043290

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Abstract

The lagrangian description of unsteady boundary-layer separation is reviewed from both analytical and numerical perspectives. We explain in simple terms how particle distortion gives rise to unsteady separation, and why a theory centred on lagrangian coordinates provides the clearest description of this phenomenon. Included in the review are some of the more recent results for unsteady three-dimensional compressible separation. The different forms of separation that can arise from symmetries are emphasized. Current work includes a possible description of separation when the detaching vorticity layer exits the classical boundary-layer region, but still remains much closer to the surface than a typical body length-scale.


Item Type:Article
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http://www.jstor.org/stable/53814JSTORArticle
Additional Information:© 1990 The Royal Society. This work was supported in part by the Applied Mathematical Sciences section of the Department of Energy (DE-AS03-76ER72012 KC-07-01-01), the U.S. Army Research Office through the Mathematical Sciences Institute of Cornell University, SERC, the Air Force Office of Scientific Research (AFOSR F49620-89-C-0014) and the National Aeronautics and Space Administration (NAS1-18605) through the Institute for Computer Applications in Science and Engineering, NASA Langley Research Centre. S.J.C. is grateful to Robert McLachlan and Philip Saffman for helpful discussions concerning the numerical results in §5.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AS03-76ER72012 KC-07-01-01
Army Research Office (ARO)UNSPECIFIED
Science and Engineering Research Council (UK)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)F49620-89-C-0014
NASANAS1-18605
Issue or Number:1631
Record Number:CaltechAUTHORS:20141217-152043290
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141217-152043290
Official Citation:On the Use of Lagrangian Variables in Descriptions of Unsteady Boundary-Layer Separation Stephen J. Cowley, Leon L. Van Dommelen and Shui T. Lam Philosophical Transactions: Physical Sciences and Engineering Vol. 333, No. 1631, The Lagrangian Picture of Fluid Motion (Nov. 15, 1990) , pp. 343-378 Published by: The Royal Society Stable URL: http://www.jstor.org/stable/53814
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52988
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Dec 2014 23:29
Last Modified:03 Oct 2019 07:46

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