Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Offshore stow net modeling and analysis of behavior using numerical methods

수치해석을 이용한 근해안강망 어구 모델링과 거동분석

  • JANG, Yong-Suk (Fisheries Engineering Research Division, National Institute of Fisheries Science) ;
  • LEE, Chun-Woo (Department of Marine Production System Management, Pukyong National University) ;
  • CHOI, Kyu-Suk (Department of Fisheries Physics & system, Pukyong National University)
  • 장용석 (국립수산과학원 수산공학과) ;
  • 이춘우 (부경대학교 해양생산시스템관리학부) ;
  • 최규석 (부경대학교 수산물리학과)
  • Received : 2021.06.22
  • Accepted : 2021.11.02
  • Published : 2021.11.30
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Abstract

The Korean stow net is a fishing method that utilizes the changing direction of the net entrance with the tidal current. This study attempted to obtain basic data from the recent offshore stow net fisheries to improve the gear by analyzing the dynamic behavior of the nets affected by current speed and direction using computer simulations. A numerical calculation was performed at a current speed of 0.5 knot between 2.5 knot at each 0.5 knot. The time taken for the gear opening was the longest from 0.5 knot at 1,500 seconds and the shortest from 2.5 knot at 450 seconds in the simulations. In all cases, the net width and tension at net deployment gradually decreased as the current speed decreased. However, the net height tended to increase inversely proportional to the current speed. During the net rotation, the net height was maintained at all cases. The net width and tension fluctuated, but the regularity was very low. In this study, the calculated simulation data showed that the opening efficiency decreased proportional to the current speed. The opening efficiency is related to the catching efficiency; therefore, it is necessary to improve the gear to enhance its opening efficiency.

Keywords

Acknowledgement

이 논문은 2020년도 해양수산부 재원으로 한국해양과학기술진흥원의 지원을 받아 수행된 연구임(C-D-2020-0081).

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