A review of velocity and pressure fluctuations in turbulent flows around bluff bodies
Identifieur interne : 002893 ( Istex/Curation ); précédent : 002892; suivant : 002894A review of velocity and pressure fluctuations in turbulent flows around bluff bodies
Auteurs : J. C. R. Hunt [Royaume-Uni] ; H. Kawai [Japon] ; S. R. Ramsey [Canada] ; G. Pedrizetti [Italie] ; R. J. Perkins [Royaume-Uni]Source :
- Journal of Wind Engineering & Industrial Aerodynamics [ 0167-6105 ] ; 1990.
Abstract
This paper is firstly a review of the theory for the changes in the velocity fluctuations in a turbulent floq as it passes around a bluff body with a simple shape such as prism or sphere. Detailed results are given for the ideal cases where the scale of the incident turbulence is much smaller or much larger than the body's diameter, but it is shown that the results are also applicable to many practical flows, including bluff bodies in the wake of others. This review gives new, simple derivations for the spectra and variances of velocity and pressure fluctuations near the surface of bluff bodies, showing why on different shapes of body and for different scales there are different distributions of pressure variance. A new approach is described for simulating realisations of the random velocity field, using the technique of ‘kinematic simulation’. Experimental results are also briefly reviewed for bluff bodies placed in homogeneous turbulence, and in inhomogeneous shear flows. The outstanding problem remains of understanding how incident turbulence interacts with the turbulence and vortex shedding in the wake of a bluff body, though there has been some progress in identifying and understanding some of the mechanisms.
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DOI: 10.1016/0167-6105(90)90210-4
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Civil Engineering, Tokyo Denki University, Hatoyama, Saitama 350-03</wicri:regionArea></affiliation></author><author><name sortKey="Ramsey, S R" sort="Ramsey, S R" uniqKey="Ramsey S" first="S. R." last="Ramsey">S. R. Ramsey</name><affiliation wicri:level="1"><mods:affiliation>Boundary Layer Wind Tunnel Laboratory, University of Western Ontario, London, Ontario, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Boundary Layer Wind Tunnel Laboratory, University of Western Ontario, London, Ontario</wicri:regionArea></affiliation></author><author><name sortKey="Pedrizetti, G" sort="Pedrizetti, G" uniqKey="Pedrizetti G" first="G." last="Pedrizetti">G. Pedrizetti</name><affiliation wicri:level="1"><mods:affiliation>Dept. Civil Engineering, Universita' di Firenze, Firenze, Italy</mods:affiliation><country xml:lang="fr">Italie</country><wicri:regionArea>Dept. 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Applied Mathematics and Theoretical Physics, Silver St, Cambridge, CB3 9EW, U.K.</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Dept. Applied Mathematics and Theoretical Physics, Silver St, Cambridge, CB3 9EW</wicri:regionArea></affiliation></author><author><name sortKey="Kawai, H" sort="Kawai, H" uniqKey="Kawai H" first="H." last="Kawai">H. Kawai</name><affiliation wicri:level="1"><mods:affiliation>Dept. Civil Engineering, Tokyo Denki University, Hatoyama, Saitama 350-03, Japan</mods:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Dept. Civil Engineering, Tokyo Denki University, Hatoyama, Saitama 350-03</wicri:regionArea></affiliation></author><author><name sortKey="Ramsey, S R" sort="Ramsey, S R" uniqKey="Ramsey S" first="S. R." last="Ramsey">S. R. Ramsey</name><affiliation wicri:level="1"><mods:affiliation>Boundary Layer Wind Tunnel Laboratory, University of Western Ontario, London, Ontario, Canada</mods:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Boundary Layer Wind Tunnel Laboratory, University of Western Ontario, London, Ontario</wicri:regionArea></affiliation></author><author><name sortKey="Pedrizetti, G" sort="Pedrizetti, G" uniqKey="Pedrizetti G" first="G." last="Pedrizetti">G. Pedrizetti</name><affiliation wicri:level="1"><mods:affiliation>Dept. Civil Engineering, Universita' di Firenze, Firenze, Italy</mods:affiliation><country xml:lang="fr">Italie</country><wicri:regionArea>Dept. Civil Engineering, Universita' di Firenze, Firenze</wicri:regionArea></affiliation></author><author><name sortKey="Perkins, R J" sort="Perkins, R J" uniqKey="Perkins R" first="R. J." last="Perkins">R. J. Perkins</name><affiliation wicri:level="1"><mods:affiliation>Dept. Applied Mathematics and Theoretical Physics, Silver St, Cambridge, CB3 9EW, U.K.</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Dept. Applied Mathematics and Theoretical Physics, Silver St, Cambridge, CB3 9EW</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Wind Engineering & Industrial Aerodynamics</title><title level="j" type="abbrev">INDAER</title><idno type="ISSN">0167-6105</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1990">1990</date><biblScope unit="volume">35</biblScope><biblScope unit="supplement">C</biblScope><biblScope unit="page" from="49">49</biblScope><biblScope unit="page" to="85">85</biblScope></imprint><idno type="ISSN">0167-6105</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0167-6105</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This paper is firstly a review of the theory for the changes in the velocity fluctuations in a turbulent floq as it passes around a bluff body with a simple shape such as prism or sphere. Detailed results are given for the ideal cases where the scale of the incident turbulence is much smaller or much larger than the body's diameter, but it is shown that the results are also applicable to many practical flows, including bluff bodies in the wake of others. This review gives new, simple derivations for the spectra and variances of velocity and pressure fluctuations near the surface of bluff bodies, showing why on different shapes of body and for different scales there are different distributions of pressure variance. A new approach is described for simulating realisations of the random velocity field, using the technique of ‘kinematic simulation’. Experimental results are also briefly reviewed for bluff bodies placed in homogeneous turbulence, and in inhomogeneous shear flows. The outstanding problem remains of understanding how incident turbulence interacts with the turbulence and vortex shedding in the wake of a bluff body, though there has been some progress in identifying and understanding some of the mechanisms.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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