Abonnement à la biblothèque: Guest
Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

THE SUSPENSION OF A SPHERE IN A TURBULENT JET

pages 1237-1242
DOI: 10.1615/TSFP6.1970
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RÉSUMÉ

We present an experimental study of a sphere freely suspended in a vertical turbulent jet. The sphere undergoes horizontal and vertical oscillations. The evolution of the mean equilibrium position, amplitudes and frequencies of the oscillating motion are described and the governing parameters are identified. Experimental results are used to investigate the origin of the lift force that attracts the sphere toward the jet axis. Finally, the role of the jet's turbulence on the system is considered. A model is proposed which links the amplitude of the sphere oscillations to external turbulent forcing.

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