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The three-dimensional cavitating flow issuing from the orifice of a ball valve was numerically investigated using the combination of RNG k-e turbulence model and multiphase flow model. The cavitation region was predicted for axisymmetric and non-axisymmetric case when the ball moves to one side. Flow visualization experiment was conducted to capture cavitation images near the orifice of the ball valve using high-speed video camera. The predicted and observed cavitation regions agree well.doi:10.5739/isfp.2002.923 fatcat:f4zqh4y6nvhepd2gxfs3uq6ida