Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Analysis of Gradually Varied Flow Considering Relative Depth in Circular Pipe

원형관에서 상대수심을 고려한 점변류 해석

  • 김민환 (호남대학교 토목환경공학과) ;
  • 박정희 (호남대학교 토목환경공학과) ;
  • 송창수 (호남대학교 토목환경공학과)
  • Received : 2006.12.12
  • Accepted : 2007.05.29
  • Published : 2007.06.15
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Abstract

When we use the circular pipes for wastewater and storm water, we should be known the characteristics of the flow for accurate design. To elevate the design accuracy, we want to know the profile of flow. The roughness coefficient in the Manning equation is constant, but in actuality changed with the relative depth in circular pipe. This study was conducted to calculate the relative normal depth in changing the roughness coefficient (named relative roughness coefficient) with the relative depth in the analysis of gradually varied flow in the circular pipe by Newton-Raphson method. We performed the analysis of gradually varied flow using the relative normal depth and the relative roughness coefficient. We presented the 12 flow profiles with the relative depth and the relative roughness coefficient in circular pipe. The flow classification considering relative depth in circular pipe is available to analyse gradually varied flow profiles.

Keywords

Acknowledgement

Supported by : 호남대학교

References

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