New Approaches and Concepts in Turbulence by Themistocles Dracos (auth.), Themistocles Dracos, Arkady

By Themistocles Dracos (auth.), Themistocles Dracos, Arkady Tsinober (eds.)

This publication includes the court cases of a colloquium held in Monte Verit� from September 9-13, 1991. specified care has been taken to dedicate sufficient house to the medical discussions, which claimed approximately 1/2 the time to be had. Scientists from around the globe provided their perspectives at the value of kinematic homes, topology and fractal geometry, and at the dynamic behaviour of turbulent flows. They debated the significance of coherent constructions and the chance to include those within the statistical concept of turbulence, in addition to their importance for the relief of the levels of freedom and the potential of dynamical structures and chaos techniques to the matter of turbulence. additionally below dialogue was once the relevance of those new techniques to the examine of the instability and the starting place of turbulence, and the significance of numerical and actual experiments in enhancing the certainty of turbulence.

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S. Zilitinkevich, On the turbulence and diffusion under free convection conditions, Izv. Akad. Nauk SSSR, Ser. Fiz. Atmos. i Okeana, 7,1263 - 1269 (825 828 in the English trans!. of the journal), 1971. R. Betchov, A. M. Yaglom, Comments on the theory of similarity as applied to turbulence in an unstably stratified fluid, Izv. Akad. Nauk SSSR, Ser. Fiz. Atmos. i Okeana, 7,1270 - 1279 (829 - 832 in the English trans!. of the journal), 1971. B. A. Kader, Three-layer structure of an unstably stratified atmospheric surface layer, Izv.

Metais and M. Lesieur), 387 - 412, Dordrecht, Kluwer, 1991. 1. C. Kaimal, Horizontal velocity spectra in an unstable surface layer, J. Atmos. , 35, 18 - 24, 1978. L. Prandtl, Meteorologische Anwendung der Stromungslehre, Beitr. Phys. , 19, 188 - 202, 1932. A. M. Obukhov, Turbulence in thermally inhomogeneous atmosphere. In Trudy Inst. Teor. Geofiz. Akad. Nauk. SSSR, No. 1,95 - lIS, 1946 (Trans!. ) A. M. Obukov, Structure of temperature and velocity fields under conditions of free convection, Izv.

It has already been stated that these predictions agree satisfactorily with some recent experimental data. Nevertheless, some questions related to these predictions need further investigation. Is it true that the energy exchange between vertical and horizontal motions is negligibly small within a rather lengthy interval of moderate positive values of ~? Does this interval coincide with that where all the corrolaries of the dimensional analysis with two different length dimensions agree satisfactorily with the data?

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