자원리싸이클링 (Resources Recycling)

  • 제32권2호
  • /
  • Pages.33-42
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  • 2023
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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교반 유무에 따른 수모델을 사용한 액적의 하강 속도에 대한 액적 크기 및 오일 점도의 영향

Influence of Droplet Size and Oil Viscosity on the Descending Velocity of Droplets Using Water Model With and Without Stirring

  • 권혁인 (조선대학교 첨단소재공학과) ;
  • ;
  • 정성용 (조선대학교 기계공학과) ;
  • 김선중 (조선대학교 신소재공학과)
  • Hyeok-In Kwon (Department of Advanced Materials Engineering, Chosun University) ;
  • Alberto Conejo (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing) ;
  • Sung Yong Jung (Department of Mechanical Engineering, Chosun University) ;
  • Sun-Joong Kim (Department of Materials Science and Engineering, Chosun University)
  • 투고 : 2023.02.25
  • 심사 : 2023.04.20
  • 발행 : 2023.04.30
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초록

금속 에멀젼(metal emulsion)은 제강 공정의 효율성을 높이는 방법으로 수십 년 동안 연구되어 왔습니다. 본 연구는 육안으로 관찰하기 어려운 고온 실험의 단점을 보완하기 위해 상온에서 관찰 가능한 수모델을 이용하여 수행하였다. 슬래그 내 금속 에멀젼의 대신하여 증류수를 실리콘 오일에 적하하여 운동량 균형 방정식에 의한 계산 결과와 비교하는 실험을 하였다. 물방울의 하강 속도는 물방울의 직경과 유체(실리콘 오일)의 점도가 증가함에 따라 감소하였다. 교반 조건에서 실리콘 오일에서 물방울의 하강 속도를 시뮬레이션하기 위해 유체(실리콘 오일)의 유속을 입자 이미지 속도계(PIV) 방법으로 측정하였다. 물방울의 하강 속도 계산은 점성 실리콘 오일을 교반하거나 교반하지 않고 측정된 값과 잘 일치하였다.

Metal emulsions have been studied for several decades as a method of increasing the efficiency of the steelmaking process. This study was performed using a water model, observable at room temperature, to compensate for the disadvantages of the high-temperature experiment, the results of which are difficult to observe visually. As a substitute for metal-in-slag emulsions, experiments were conducted by dropping distilled water into silicone oil and comparing the results with the results of a calculation by momentum balance equations. The descending velocity of the water droplet decreased as the diameter of the droplet and viscosity of the fluid (silicon oil) increased. To simulate the descending velocity of a water droplet in silicon oil under stirring conditions, the flow rate of the fluid (silicon oil) was measured by particle image velocimetry (PIV) methods. The calculation of the descending velocity of the water droplet was in good agreement with the measured values, with and without stirring a viscous silicone oil.

키워드

과제정보

This research was funded by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry, and Energy of the Republic of Korea (grant number: 20212010100060).

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