Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Numerical Analysis of the Flow Field around Artificial Reefs

인공어초 주변의 흐름장에 관한 수치해석

  • Jeong, Chil-Hoon (Department of Ocean Engineering, Pukyong National University) ;
  • Kim, Heon-Tae (Department of Ocean Engineering, Pukyong National University)
  • 정칠훈 (부경대학교 해양공학과) ;
  • 김헌태 (부경대학교 해양공학과)
  • Published : 2007.02.28
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Abstract

This study investigated the fluid force acting on an artificial reef and the scour pattern at the bottom of the artificial reef in a steady-flow field using the finite difference method (Flow-3D). The structure was tetragonal in shape, like similar objects found in nature. The numerical analysis showed that the hydrodynamic characteristics and incipient scouring pattern matched natural phenomena. The velocity distribution around the tetragon was symmetric and wake occurred inside the tetragon and behind the bottom of the tetragon. The length of the recirculation flow behind the tetragon for each velocity was about 4-5 cm and the magnitude of the recirculation flow inside the tetragon generally increased with the Reynolds' number, although it decreased slightly for Reynolds' numbers from 11,000 to 12,000. In addition, the total fluid force acting on the tetragon increased with the inflow velocity, although the increment was smaller when the velocity exceed 18 cm/sec. The incipient pattern for the scouring of sediment matched the natural phenomenon.

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References

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