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Analysis of separation in turbulent on incompressible flow
KTH, School of Computer Science and Communication (CSC), Numerical Analysis, NA.ORCID iD: 0000-0003-4256-0463
2011 (English)Manuscript (preprint) (Other academic)
Abstract [en]

We present a scenario of stable 3d rotational separation in high Reynolds number slightly viscous incompressible turbulent flow around a solid body such as an airplane, car or boat, supported by computation, mathematical analysis and experimental observation. Our scenario is fundamentally different from the scenario of unstable 2d irrotational separation in viscous flow advocated by Prandtl in 1904 signifying the birth of modern fluid mechanics of viscous flow as a development of classical fluid mechanics of inviscid potential flow presented by Euler and d’Alembert. Our scenario allows for a description of high Reynolds number slightly viscous flow past a solid body as inviscid potential flow before separation followed by 3d rotational separation, thus providing a solution to the basic problem of theoretical fluid mechanics of describing the main characteristics of slightly viscous flow in mathematical terms. We also show that the pressure distribution of3d rotational separation is a determining factor for both drag and lift of a wing

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Computer and Information Science
URN: urn:nbn:se:kth:diva-58674OAI: diva2:473790
QC 20120207Available from: 2012-01-07 Created: 2012-01-07 Last updated: 2012-02-07Bibliographically approved

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Hoffman, Johan
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Numerical Analysis, NA
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