상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제23권6호
  • /
  • Pages.825-832
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  • 2009
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
권호 표지

선택취수에 의한 2차원 밀도류의 흐름특성에 관한 실험적 연구

Experimental Study on the Velocity Structure of 2-D Density Current Induced by Selective Withdrawal

  • 투고 : 2009.10.26
  • 심사 : 2009.12.10
  • 발행 : 2009.12.15
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초록

A series of laboratory experiments has been performed to investigate the flow characteristics of 2-dimensional density currents induced by selective withdrawal, which is commonly suggested as a measure for removal of high turbid water from reservoirs. Saltwater has been used to simulate the density stratification over depth and PIV(Particel Image Velocimetry) for observing the velocity structure. Experimental conditions have been established according to Richardson number, which is the dimensionless number that expresses the ratio of potential to kinetic energy. From the experiments, the patterns of longitudinal decay of centerline axial velocity induced by the withdrawal have been distinguished from other experimental cases. The rate of longitudinal decay increase as the Richardson number increases. The variations of volumetric and momentum flux along the longitudinal axis have also shown to be dependent on Richardson number.

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참고문헌

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