Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Flow Characteristic of Artificial Upwelling by CFD

CFD를 이용한 인공용승류 특성 연구

  • 이황기 (전남대학교 조선해양공학과) ;
  • 김종규 (전남대학교 조선해양공학과) ;
  • 이문옥 (전남대학교 조선해양공학과) ;
  • 김현주 (선박해양플랜트연구소 해수플랜트연구센터) ;
  • 오다케 신야 (후쿠이현립대학)
  • Received : 2015.10.29
  • Accepted : 2015.12.01
  • Published : 2015.12.31
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Abstract

The flowing caused by artificial upwelling structure occurs ascending water flowing and vortex of rear side. In this moment, plentiful nutrient in the bottom water moves to the surface of the water and makes those plankton and fishing ecology promoted so that the fishing productivity can be enhanced. In this study, the changes of the upwelling flowing is included in consideration of the conditions of stratification by using CFD. In the conclusion, the closer upwelling effect is from the artificial upwelling structure, the better effectiveness comes out. Regardless of the conditions of stratification, only the upwelling feature from the bottom to the surface was shown up. But considering the conditions of stratification, the repeated flowing feature between upwelling and downwelling was verified.

인공용승구조물은 흐름이 구조물에 의해 상승류와 배후면의 와류가 발생한다. 이때 저층수에 포함된 영양염이 표층으로 이동되고, 표층에선 플랑크톤 및 어류의 생태활동을 촉진시켜, 어업생산성을 향상시키는 역할을 한다. 본 연구에서는 CFD를 이용하여 성층 상태를 고려한 인공용승류의 변화에 대하여 연구하고자 하였으며, 그 결과, 용승효과는 인공용승구조물의 최상부에서 가까울수록 좋은 효과가 나타났으며, 성층상태를 고려하지 않은 경우, 저층에서 표층으로 향하는 상승류 특성만 나타났으나, 성층상태를 고려한 경우, 상승류와 하강류가 반복되는 흐름특성을 확인 할 수 있었다.

Keywords

References

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Cited by

  1. Flow Characteristics of the Artificial Upwelling Structure by Porosity Change vol.20, pp.2, 2017, https://doi.org/10.7846/JKOSMEE.2017.20.2.100