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Hydrodynamic Fluctuations in Couette Flow

Chagelishvili, George D. and Khujadze, George and Lominadze, J. G.
Dopazo, C. (ed.) (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), Barcelona, Spain, CIMNE, pp. 67-70, [Book Section]

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.

Item Type: Book Section
Erschienen: 2000
Editors: Dopazo, C.
Creators: Chagelishvili, George D. and Khujadze, George and Lominadze, J. G.
Title: Hydrodynamic Fluctuations in Couette Flow
Language: English
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.

Title of Book: Advances in Turbulence VIII: Proceedings of the Eighth European Turbulence Conference. Held in Barcelona, Spain, June 27-30, 2000 (ETC-8)
Place of Publication: Barcelona, Spain
Publisher: CIMNE
ISBN: 84-89925-65-8
Divisions: 16 Department of Mechanical Engineering > Fluid Dynamics (fdy)
16 Department of Mechanical Engineering
Date Deposited: 30 Aug 2011 14:39
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