Fluxes and energy dissipation in thermal convection and shear flows

  • We expose analogies between turbulence in a fluid heated from below (Rayleigh-Bénard (RB) flow) and shear flows: The unifying theory for RB flow (S.Grossmann and D.Lohse, J.Fluid Mech. 407, 27-56 (2000) and subsequent refinements) can be extended to the flow between rotating cylinders (Taylor-Couette flow) and pipe flow. We identify wind dissipation rates and momentum fluxes that are analogous to the dissipation rate and heat flux in RB flow. The proposed unifying description for the three cases is consistent with the experimental data.

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Author:Bruno Eckhardt, Siegfried Grossmann, Detlef Lohse
Document Type:Article
Date of Publication (online):2006/10/20
Release Date:2006/10/20
Tag:Buoyancy driven flows; Taylor Couette flow; energy dissipation; heat current; momentum flux; pipe flow; thermal convection
Source:Europhysics letters. 78, no. 2, (2007): 24001
Institutes:BBAW / Veröffentlichungen von Akademiemitgliedern
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik