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Jet-Ball Interaction Phenomenon in Check-Ball Valve
Shuichi Torii and Wen-Jei Yang

A numerical visualization study is performed to investigate fluid-solid interactions in a check-ball valve. Water is the test fluid, while the balls are made of various materials of different specific weights. A hollow cone with a 45-degree angle is employed. The flow rate is varied to include the Reynolds numbers, ranging from 500 to 1500. When laminar flow passes through the check-ball valve, a large vortex appears behind the check ball and the flow downstream from it is disturbed. This trend is amplified with an increase in the Reynolds number. At the same Reynolds number, the flow turbulence due to the presence of the check ball becomes greater for the material of heavy-specific weight.

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