Abstract
Previous theoretical and observational investigations have shown that vertical plumes are formed in the high Rayleigh number convection field over heated horizontal surfaces and that these plumes become unsteady and turbulent when the Rayleigh number is higher than about 20 times its critical value R c. Based on these results, we conclude that the dissipation of kinetic energy takes place mainly in the surface boundary layer in high Rayleigh number laminar convection and mainly in the vertical plumes in turbulent convection, while the conversion of eddy potential energy into kinetic energy is accomplished mainly in the well-mixed main body of the fluid. On making use of these rather general conclusions concerning the kinetic energy generation and dissipation processes in the energy integrals, we are able to derive the well known 5/4 and 4/3 power laws of upward heat transfer by laminar and turbulent convections theoretically.
Similar content being viewed by others
References
Gaynor, J. E. and Mandic, P. A.: 1978, ‘Analysis of the Tropical Marine Boundary Layer During GATE Using Acoustic Sounder Data’, Mon. Wea. Rev. 106, 223–232.
Herring, J. R.: 1963, ‘Investigation of Problems of Thermal Convection’, J. Atmos. Sci. 20, 325–338.
Jacob, M.: 1949, Heat Transfer, John Wiley and Sons, New York, Vol. 1, 785pp.
Kuo, H. L.: 1961, ‘Solutions of the Nonlinear Equations of Cellular Convection and Heat Transport’, J. Fluid Mech. 10, 611–634.
Kuo, H. L. and Sun, W. Y.: 1976, ‘Convection in the Lower Atmosphere and its Effects’, J. Atmos. Sci. 33, 21–40.
Priestley, C. H. B.: 1954, ‘Convection from a Large Horizontal Surface’, Australian J. Phys. 7, 176–201.
Rossby, H. T.: 1969, ‘A Study of Benard Convection With and Without Rotation’, J. Fluid Mech. 36, 309–335.
Saltzman, B.: 1962, ‘Finite Amplitude Free Convection as an Initial Value Problem’, J. Atmos. Sci. 19, 329–341.
Silveston, P. L.: 1958, ‘Warmedurchgang in waagerechten Flussigkeitsschichten’, Forsch. Ing. 24, 29–32; 59–69.
Sutton, O. A.: 1953, Micrometeorology, McGraw-Hill Co., New York, 331 pp.
Thomas, D. B. and Townsend, A. A.: 1957, ‘Turbulent Convection Over a Heated Horizontal Surface’, J. Fluid Mech. 2, 473–492.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kuo, H.L. Power laws of high Rayleigh number convection. Boundary-Layer Meteorol 17, 29–39 (1979). https://doi.org/10.1007/BF00121935
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00121935