Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
권호 표지
DOI QR코드

DOI QR Code

A Similarity of the Velocity Profiles According to Water Depth in Partially Filled Circular Pipe Flows

비만관 상태의 원형관로에서 수위에 따른 속도분포의 상사성

  • 윤지인 (서울산업대학교 기계공학과) ;
  • 김영배 (서울산업대학교 에너지시스템연구소) ;
  • 성재용 (서울산업대학교 기계공학과) ;
  • 이명호 (서울산업대학교 기계공학과)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Contrary to the flow rate in fully filled pipe flows, the flow rate in partially filled pipe flows is significantly influenced by the variation of water level, channel slop, and so on. The major difference in these two flows results from the existence of a free surface. To make it clear, in the present study, a similarity of the velocity profile in a partially filled circular pipe has been investigated according to the water level. A particle image velocimetry (PIV) technique was applied to measure the three-dimensional velocity profiles. As a result, there is found a similarity of the velocity profile near the central region. However, near the side wall, the similarity is broken due to the interaction between the wall and the free surface.

Keywords

References

  1. Manning, R., 1891, "On the Flow of Water in Open Channels and Pipes," Transactions of the Institution of Civil Engineers of Ireland, Vol. 20, pp. 161-207.
  2. Enfinger, K. L. and Kimbrough, H. R., 2004, "Scattergraph Principles and Practice - A Comparison of Various Applications of the Manning Equation," Proc. ASCE Pipeline Division Specialty Conference, pp. 1-13.
  3. Lanfear, K. J. and Coll, J. J., 1978, "Modifying Manning's Equation for Flow Rate Estimates," Water and Sewage Works, Vol. 125, No. 3, pp. 68-69.
  4. Enfinger, K. L. and Schutzbach, J. S., 2005, "Scattergraph Principles and Practice - Camp's Varying Roughness Coefficient Applied to Regressive Methods," Proc. ASCE Pipeline Division Specialty Conference, pp. 72-83.
  5. Sung, J. and Yoo, J. Y., 2001, "Three-Dimensional Phase Averaging of Time-Resolved PIV Measurement Data," Meas. Sci. Technol, Vol. 12, No. 6, pp. 655-662. https://doi.org/10.1088/0957-0233/12/6/301
  6. Scarano, F. and Riethmuller, M. L., 1999, "Iterative Multigrid Approach in PIV Image Processing with Discrete Window Offset," Exp. in Fluids, Vol. 26, pp. 513-523. https://doi.org/10.1007/s003480050318
  7. Hart, D. P., 1998, "Super-Resolution PIV by Recursive Local-Correlation," Proc. VSJ-SPIE98, AB149, pp. 1-10.