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자료유형
학술저널
저자정보
최한호 (서강대학교) 최종락 (서강대학교) 허남건 (서강대학교) 정광훈 (하도 기술연구소) 임선영 (하도 기술연구소) 옥태준 (하도 기술연구소)
저널정보
한국전산유체공학회 한국전산유체공학회지 한국전산유체공학회지 제26권 제3호
발행연도
2021.9
수록면
101 - 107 (7page)
DOI
10.6112/kscfe.2021.26.3.101

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In this study, transient multiphase flow simulations were carried out to evaluate the new volume uniformity indices of gas and solid particles concentrations within the 3-phase industrial stirred vessel. In the initial state, the solid phase is located at the bottom portion of the vessel with the liquid phase positioned on top. Afterwards, the gas is injected at the middle-section of the vessel from four nozzles and discharged to the top of the vessel and in the process commences the reaction between the liquid and particle phases. To focus on the mixing phenomena, this reaction process was not simulated. A sliding grid technique was adopted to describe the rotating motion of the impellers at three different stages. The mixture flows between gas, liquid, and solid particles were simulated using the Eulerian multiphase model with STAR-CCM+ V.2020.3. Since the conventional method defines volume uniformity indices based on the entire domain, there was a limitation to predict the details of volume uniformity indices of a specific phase. For the above reason, the new volume uniformity indices of the gas and solid particles in the liquid phase were proposed and compared with the conventional method by conducting the 3-phase simulations. The new volume uniformity indices of concentrations were more effective in predicting the degree of mixing level quantitatively. In such a 3-phase flow, the actual mixing degree in the stirred vessel can be determined using the proposed volume uniformity indices of concentration, which can be used to represent the stirring performance.

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