Chagelishvili, George D. ; Khujadze, George ; Lominadze, J. G.
Hrsg.: Dopazo, C. (2000)
Hydrodynamic Fluctuations in Couette Flow.
In: Advances in Turbulence VIII: Proceedings of the Eighth European Turbulence Conference. Held in Barcelona, Spain, June 27-30, 2000 (ETC-8)
Buchkapitel, Bibliographie
Kurzbeschreibung (Abstract)
The dynamics of perturbations in plane Couette flow (pCf) is analyzed from the standpoint of probabilistic and dynamic systems. In the absence of a sharp transitional border, a probabilistic approach to the definition of a transitional Reynolds nunmber is employed. It is found that more than half the initial conditions remain turbulent for the full integration time if Re exceeds a value of about 320. In numerical annealing experiments, it was possible to follow the turbulent state down to Reynolds numbers of about 240. A promising approach for futher investigation is the embedding of pCf into Couette-Taylor flow between concentric cylinders. The planar case emerges in the limit of large radii and exhibits similar behavior in an experimentally accessible parameter range.
| Typ des Eintrags: | Buchkapitel |
|---|---|
| Erschienen: | 2000 |
| Herausgeber: | Dopazo, C. |
| Autor(en): | Chagelishvili, George D. ; Khujadze, George ; Lominadze, J. G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Hydrodynamic Fluctuations in Couette Flow |
| Sprache: | Englisch |
| Publikationsjahr: | 2000 |
| Ort: | Barcelona, Spain |
| Verlag: | CIMNE |
| Buchtitel: | Advances in Turbulence VIII: Proceedings of the Eighth European Turbulence Conference. Held in Barcelona, Spain, June 27-30, 2000 (ETC-8) |
| Kurzbeschreibung (Abstract): | The dynamics of perturbations in plane Couette flow (pCf) is analyzed from the standpoint of probabilistic and dynamic systems. In the absence of a sharp transitional border, a probabilistic approach to the definition of a transitional Reynolds nunmber is employed. It is found that more than half the initial conditions remain turbulent for the full integration time if Re exceeds a value of about 320. In numerical annealing experiments, it was possible to follow the turbulent state down to Reynolds numbers of about 240. A promising approach for futher investigation is the embedding of pCf into Couette-Taylor flow between concentric cylinders. The planar case emerges in the limit of large radii and exhibits similar behavior in an experimentally accessible parameter range. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) |
| Hinterlegungsdatum: | 30 Aug 2011 14:39 |
| Letzte Änderung: | 15 Nov 2024 19:06 |
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