By P. Huerre, K. Amram, J. M. Chomaz (auth.), Louis Fulachier, John L. Lumley, Fabien Anselmet (eds.)
The normal meeting of the overseas Union of Theoretical and utilized Mechanics in its assembly on August 28, 1994, chosen for 1996 in basic terms 4 Mechanics Symposia, of which ours is the one one on the topic of Fluid Mechanics: Variable Density Low pace Turbulent Flows. This IUTAM Symposium, geared up through the Institut de Recherche sur les Phenomenes Hors Equilibre (Marseille), is the logical continuation of the conferences formerly geared up or co-organized - at the French or ecu point, corresponding to Euromech 237, Marseille, 1988 - by way of a similar examine crew ofMarseille. This assembly centred in particular at the constitution of turbulent flows during which density varies strongly : the influence of this transformation at the pace and scalar fields is in no experience negligible. We have been typically curious about low-speed flows subjected to powerful neighborhood alterations of density due to warmth or mass move or of chemical reactions. Compressible turbulent flows - such a!" supersonic ones - have been additionally thought of that allows you to underline their similarities to and their variations from low-speed variable density flows.
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Additional resources for IUTAM Symposium on Variable Density Low-Speed Turbulent Flows: Proceedings of the IUTAM Symposium held in Marseille, France, 8–10 July 1996
Example text
15] and numerically by Socolescu et al. [16] suggests that this control is due to both changes of the dynamic viscosity and density with temperature. In parallel a large number of numerical calculations have reported the influence of buoyancy effect on the development of the vortex shedding phenomenon, Chang and Sa [17], Vilimpoc et al. [9]. 10- 2 , Merkin [18] . 43 L. Fulachier et al. ), IUTAM Symposium on Variable Density Low-Speed Turbulent Flows, 43-50. © 1997 Kluwer Academic Publishers. C.
The point is that the vortex core radius changes with distance, whereas it is necessary to know its magnitude exactly for calculation of temperature in the core. On the other hand, the fact that acoustic diagnostics gives integral characteristics is one of its primary advantages. In order to obtain such characteristics by means of a temperature probe, for example, one needs to make measurements at very many points. The spectral peaks of the scattered harmonics were observed to split in a definite range of heating temperatures and Reynolds numbers (see Fig.
6. : Direct numerical simulations of round jets: Vortex induction and side jets, Phys. Fluids' (1994), 1768-1774. 7. : Concentration measurements in a selfexcited jet, to appear in Expts. Fluids. 8. , Manuscript to be submitted for publication. 9. : Global density effects on the self-preservation behavior of turbulent free jets, J. Fluid Mech. 254 (1993), 417-435. 10. : The application of laser-induced Rayleigh light scattering to the study of turbulent mixing, J. Fluid Mech. 141 (1984),391-429.