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http://dx.doi.org/10.5762/KAIS.2020.21.10.144

Numerical Study on the Flow Characteristics of Bubble Particles in Bubble Reduction Device  

Mun, Hyun-Sik (Mechanical Engineering, Graduate School, Kongju National University)
Yoo, Young-Cheol (Mechanical Engineering, Graduate School, Kongju National University)
Park, Sung-Young (Div. of Mechanical & Automotive Engineering, Kongju National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.10, 2020 , pp. 144-149 More about this Journal
Abstract
Bubble reduction devices are intended to solve problems related to the quantitative supply of oil. Therefore, in this study, numerical analysis was conducted to verify the flow characteristics of bubble particles during the operation of a bubble reduction device. As a result of the basic analysis, the area where the rise and fall of bubbles were most active was found, and numerical calculations were performed focusing on the points. Before the numerical calculations, a non-dimensional derivation was performed to secure homogeneity among the variables. Based on the data obtained from non-dimension derivation, 25 variable conditions for each particle size and fluid velocity were set. Through separate calculations, the equation for bubble rise and fall was derived. By calculating the ratio of drag and buoyancy for each variable, if the drag force acting on the bubble was greater than buoyancy, the bubble falls, and bubbles are not reduced. If the buoyancy is larger than drag, the bubble rises, and the bubble is reduced. Through the analysis, the rise and fall of the bubble were confirmed, and the results were consistent with the separate numerical calculations.
Keywords
Bubble Particles; Bubble Reduction Device; Buoyancy Force; Drag Force; Two-Phase Flow;
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