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How heat transfer efficiencies in turbulent thermal convection depend on internal flow modes

Published online by Cambridge University Press:  25 May 2011

KE-QING XIA*
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
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Abstract

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How internal flow states can influence the global transport properties in a turbulent system has always been an intriguing question. Weiss & Ahlers (J. Fluid Mech., this issue, vol. 676, 2011, pp. 5–40) have provided an example by measuring the instantaneous Nusselt number in turbulent Rayleigh-Bénard convection and correlating it to the different modes of large-scale flow.

Type
Focus on Fluids
Copyright
Copyright © Cambridge University Press 2011

References

Ahlers, G., Grossmann, S. & Lohse, D. 2009 Heat transfer and large scale dynamics in turbulent Rayleigh-Bénard convection. Rev. Mod. Phys. 81, 503537.Google Scholar
Funfschilling, D. & Ahlers, G. 2004 Plume motion and large scale circulation in a cylindrical Rayleigh-Bénard cell. Phys. Rev. Lett. 92, 194502.Google Scholar
Kraichnan, R. H. 1962 Turbulent thermal convection at arbitrary Prandtl number. Phys. Fluids 5, 1374–89.Google Scholar
Lohse, D. & Xia, K.-Q. 2010 Small-scale properties of turbulent Rayleigh-Bénard convection. Annu. Rev. Fluid Mech. 42, 335–64.Google Scholar
Roche, P. E., Castaing, B., Chabaud, B. & Hebral, B. 2002 Prandtl and Rayleigh numbers dependences in Rayleigh-Bénard convection. Europhys. Lett. 58, 693698.CrossRefGoogle Scholar
Sun, C., Xi, H.-D. & Xia, K.-Q. 2005 Azimuthal symmetry, flow dynamics, and heat flux in turbulent thermal convection in a cylinder with aspect ratio one-half. Phys. Rev. Lett. 95, 074502.Google Scholar
Weiss, S. & Ahlers, G. 2011 Turbulent Rayleigh-Bénard convection in a cylindrical container with aspect ratio Γ = 0.50 and Prandtl number Pr = 4.38. J. Fluid Mech. 676, 540.Google Scholar
Xi, H.-D., Lam, S. & Xia, K.-Q. 2004 From laminar plumes to organized flows: the onset of large-scale circulation in turbulent thermal convection. J. Fluid Mech. 503, 4756.Google Scholar
Xi, H.-D. & Xia, K.-Q. 2007 Cessations and reversals of the large-scale circulation in turbulent thermal convection. Phys. Rev. E 76, 036301.Google Scholar
Xi, H.-D. & Xia, K.-Q. 2008 a Azimuthal motion, reorientation, cessation and reversal of the large-scale circulation in turbulent thermal convection: a comparison between aspect ratio one and one-half geometries. Phys. Rev. E 78, 036326.Google Scholar
Xi, H.-D. & Xia, K.-Q. 2008 b Flow mode transitions in turbulent thermal convection. Phys. Fluids 20, 055104.Google Scholar