Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on the Similarity of Laminar Flows between in Orthogonally Rotating Square Duct and Stationary Curved Squared Duct

수직축을 중심으로 회전하는 직관과 정지한 곡관내에서의 층류 유동의 유사성 비교

  • Lee, Gong-Hui (Dept. of Mechanical Engineering, Graduate School of Pohang University of Science and Technology) ;
  • Baek, Je-Hyeon (Dept. of Mechanical Engineering, Graduate School of Pohang University of Science and Technology)
  • 이공희 (포항공과대학교 대학원 기계공학과) ;
  • 백제현 (포항공과대학교 대학원 기계공학과)
  • Published : 2000.12.01
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Abstract

In this study, it is numerically revealed that the secondary flow due to the Coriolls force in a straight duct rotating about an axis perpendicular to that of the duct is analogous to that caused by the centrifugal force in a stationary curved duct. Dimensionless parameters $K_{LR}=Re/\sqrt{Ro}$ and Rossby number in a rotating straight duct were used as a set corresponding to Dean number and curvature ratio in a stationary curved duct. When the value of Rossby number and curvature ratio is large, it is shown that the flow field satisfies the `asymptotic invariance property`, that is, there are strong quantitative similarities between the two flows such as friction factors, flow patterns, and maximum axial velocity magnitudes for the same values of $K_{LR}$ and Dean number.

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References

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