飲料缶から注ぎ出される液体の挙動に関する可視化実験および数値解析

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  • Experimental and Numerical Study of the Motion of a Liquid Pouring from a Beverage Can

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The motion of a liquid pouring from a beverage can is experimentally and numerically studied. First, we measure pouring motion for sixteen examinees and find that the can motion in pouring consists of three stages; tipping stage, filling stage, and returning stage. In each stage, the angular velocity of a can is nearly constant, and its average velocity is obtained. A liquid flow from a can rotating at the average angular velocity is visualized with high-speed cameras and is also numerically simulated with the Volume of Fluid (VOF) method. At the beginning of pouring, the liquid from a can opening is once blocked by the rim of a upper lid and then flows over the rim. It falls from the can forming a V-shaped surface, which converges few centimeters below the rim expanding the liquid surface in the direction perpendicular to the V-shaped surface. This results in a wavy pattern of the liquid surface. The computational result agrees with the experiment.

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