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International Symposium on Multiphase Flow and Transport Phenomena
November, 5-10, 2000, Antalya, Turkey

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhen


ISBN Print: 1-56700-162-9

SEGRE-SILBERBERG EFFECT AND GENERATION OF TURBULENCE IN SHEAR FLOW

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SINOPSIS

Interpretation is given of the Segre-Silberberg effect (expressing itself in the specific radial migration of neutrally suspended spherical particles in the Poiseuille flow) in the light of offered in 1980s model of generation of turbulence connecting this process to formation in the laminar shear flow of ordered micro-vorticity. The model predicts concentration of neutrally suspended spherical particles in the laminar shear flow at the surface formed by centroids of micro-vortexes. This result, as well as establishment in recent years of similarity between dynamics of formation of the large-scale turbulent vortexes and critical transition at magnetization of ferromagnet may be considered as supporting evidences for the model mentioned. The surface mentioned and a distance between that and friction surfaces are named, respectively, as an inversion surface (in connection with change there of the sign of influence of the ordered vortex system on an individual micro-vortex) and an inversion thickness.

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