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Numerical Modeling of Free Surface at the Fish Migration Spillways

어류 이동용 여수로의 자유수면 수치해석

  • 이해균 (단국대학교 천안캠퍼스 토목환경공학과)
  • Received : 2010.07.30
  • Accepted : 2010.08.23
  • Published : 2010.08.28

Abstract

A level-set finite-element method is employed to investigate the free surface flow of two conceptual fish passage designs. While one design has a right-angled entrance from the reservoir to the fish passage chute, the other has a curved-shaped entrance. The numerical results are validated with hydraulic experiments through comparison of the free surface location and the pressure distribution in the spillway. It is observed that the right-angled design yields a curved free surface and pressure distribution in the vicinity of the entrance due to large strains, whereas the curved-shaped design yields a smooth flow transition with small strains. The subatmospheirc pressure distributions near the spillway ogee crest for both designs exhibit similar flow patterns. It is concluded that the curved-shaped design is more favorable for fish passage because of the feature of a smooth flow transition with small strains.

Keywords

Fish Management;Finite Element Method;Free Surfaces;Spillways

Acknowledgement

Supported by : 한국건설교통기술평가원

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