Experimental Study of Turbulent Asymmetric Flow in a Flat Duct Symmetric Sudden Expansion

The present work involves an experimental study of bubble flow in a flat horizontal sudden expansion. This study consists of two parts which are interdependent and complementary. The qualitative study by visualization shows that the bubble flow changes from a dissymetric configuration to a symmetric configuration beyond a certain volumetric quality x. The quantitative study involves evolutions of the pressure, the void fraction, the phase velocities and granulometry downstream of the singularity for a quasi-symmetric bubble flow.

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