Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Numerical Analysis of Freezing Phenomena of Water in a U-Type Tube

U자형 배관 내 결빙에 대한 해석적 연구

  • Park, Yong-Seok (School of Convergence Mechanical Engineering, Gyeongsang National University) ;
  • Suh, Jeong-Se (School of Mechanical Engineering, Gyeongsang National UNIV.)
  • 박용석 (경상대학교 융합기계공학과) ;
  • 서정세 (경상대학교 기계공학부, ReCAPT)
  • Received : 2019.09.19
  • Accepted : 2019.10.20
  • Published : 2019.12.31
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Abstract

This study numerically analyzed the icing process in a U-shaped pipe exposed to the outside by considering the mushy zone of freezing water. Numerical results showed that the flow was pulled outward due to the U-shaped bend in the freezing section exposed to the outside, which resulted in the ice wave formation on the wall of the bended pipe behind. At the same time, the formation of a corrugated ice layer became apparent due to the venturi effect caused by the ice. The factors affecting the freezing were investigated, including the change of the pipe wall temperature, the water inflow velocity, and the pipe bend spacing. It was found that, as a whole, the thickness of the freezing layer increased as the pipe wall temperature decreased. It was also found that the freezing layer became relatively thin when the inflow rate of water was increased, and that the spacing of the pipe bends did not significantly impact the change in the freezing layer.

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