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Turbulence - minimum dissipation and maximum macroscopic momentum exchange

  • The minimum dissipation requirement of the thermodynamics of irreversible processes is applied to characterize the existence of laminar and non-laminar, and the co-existence of laminar and turbulent flow zones. Local limitations of the different zones and three different forms of transition are defined. For the Couette flow a non-local “corpuscular” flow mechanism explains the logarithmic law-of-the-wall, maximum turbulent dimensions and a value x=0,415 for the v. Kármán constant. Limitations of the logarithmic law near the wall and in the centre of the experiment are interpreted.

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Author:Hans Paul Drescher
Document Type:Working Paper
Year of Completion:2021
Publishing Institution:Fachhochschule Aachen
Date of the Publication (Server):2024/04/19
Length:44 Seiten
Licence (German):License LogoCreative Commons - Namensnennung