Advances in Turbulence V: Proceedings of the Fifth European by R. A. Antonia, Y. Zhu, M. Sokolov (auth.), Roberto Benzi

By R. A. Antonia, Y. Zhu, M. Sokolov (auth.), Roberto Benzi (eds.)

Under the auspices of the Euromech Committee, the 5th ecu Turbulence convention was once held in Siena on 5-8 July 1994. Following the former and so forth assembly in Lyon (1986), Berlin (1988), Stockholm (1990) and Delft (1992), the 5th and so forth used to be geared toward delivering a evaluation of the elemental facets of turbulence from a theoretical, numerical and experimental viewpoint. within the extraordinary city of Siena, greater than 250 scientists from worldwide, spent 4 days discussing new rules on turbulence. As a study employee within the box of turbulence, i need to say that the works awarded on the convention, on which this e-book is predicated, lined just about all parts during this box. I additionally imagine that this booklet presents an enormous chance to have a whole review of the latest study works. i'm super thankful to Prof. C. Cercignani, Dr. M. Loffredo, and Prof. R. Piva who, as participants of the neighborhood organizing committee, proportion the good fortune of the convention. I additionally are looking to thank Mrs. Liu' Catena, for her helpful contribution to the paintings performed by way of the neighborhood organizing committee and the ecu Turbulence Committee within the clinical association of the assembly. The "Servizio Congressi" of the college of Siena supplied ideal association in Siena and lovely hospitality. The convention has been supported by means of CNR, Cira, Alenia, the schools of Rome "Tor Vergata" and "La Sapienza".

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Extra info for Advances in Turbulence V: Proceedings of the Fifth European Turbulence Conference, Siena, Italy, 5–8 July 1994

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The main idea is to emulate 41 R. ), Advances in Turbulence V, 41-46. © 1995 Kluwer Academic Publishers. 42 the dynamical separation between large scales, where most kinetic energy is contained, from small ones, where dissipation takes place [4]. The present work compares the statistical results of two numerical simulations of 3-D homogeneous turbulence. 005 (DNS). The simulations are based on the Fourier spectral representation of the N avierStokes equations where the pseudospectral numerical method is used to accurately resolve the equations on a regular grid and in a periodic box.

The Germano model yielded a stronger dynamical behaviour. Acknowledgements This work was sponsored by the National Computing Facilities Foundation, NCF for the use of supercomputer facilities, with financial support from the Netherlands Organization for Scientific Research, NWO. References 1. 2. 3. 4. 5. 6. 7. 8. M. M. A. van Steenhoven, and Nieuwstadt. Direct and large-eddy simulation oftransient buoyant plumes: A comparison with an experiment. R. Voke, L. P. Chollet, editors, Direct and Large-Eddy Simulation I, pages 399-410.

The curves are normalized SUell that the energy of the (1,1) mode at inflow is set to unity. heir correct. inflow value. Figure 4 shows the the development. , Tw is the time and spanwise averaged wall shear stress). It is evident that the simulation captures the complete transition process, all the way into the turbulent regime. tive to the laminar value. The subsequent rapid increase of the frictioll coincifles with the latter part of the growth for the (0, ±2) modes. h. We can now ill the light of these findings and previous investigations identify three stages of oblique transition: Initial non-linear generation of a streamwise vortex by the two oblique waves.

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