Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Numerical Analysis of Deep Seawater Flow Disturbance Characteristics Near the Manganese Nodule Mining Device

망간단괴 집광기 주위 해수 유동교란 수치해석

  • Lim, Sung-Jin (Division of Mechanical & Automotive Engineering, College of Engineering, Wonkwang University) ;
  • Chae, Yong-Bae (Division of Mechanical & Automotive Engineering, College of Engineering, Wonkwang University) ;
  • Jeong, Shin-Taek (Department of Civil and Environmental Engineering, College of Engineering, Wonkwang University) ;
  • Cho, Hong-Yeon (Coastal & Environmental Engineering Division, KIOST) ;
  • Lee, Sang-Ho (Division of Mechanical & Automotive Engineering, College of Engineering, Wonkwang University)
  • 임성진 (원광대학교 공과대학 기계자동차공학부) ;
  • 채용배 (원광대학교 공과대학 기계자동차공학부) ;
  • 정신택 (원광대학교 공과대학 토목환경공학과) ;
  • 조홍연 (한국해양과학기술원 연안공학연구본부) ;
  • 이상호 (원광대학교 공과대학 기계자동차공학부)
  • Received : 2014.10.21
  • Accepted : 2014.12.16
  • Published : 2014.12.30
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Abstract

Seawater flow characteristics around a manganese nodule mining device in deep sea were analyzed through numerical investigation. The mining device influences the seawater flow field with complicated velocity distributions, and they are largely dependent on the seawater flow speed, device moving speed, and injection velocity from the collecting part. The flow velocity and turbulent kinetic energy distributions are compared at several positions from the device rear, side, and top, and it is possible to predict the distance from which the mining device affects the seawater flow field through the variation of turbulent kinetic energy. With the operation of the collecting device the turbulent kinetic energy remarkably increases, and it gradually decreases along the seawater flow direction. Turbulent kinetic energy behind the mining system increases with the seawater flow velocity. The transient behavior of nodule particles, which are not collected, is also predicted. This study will be helpful in creating an optimal design for a manganese nodule collecting device that can operate efficiently and which is eco-friendly.

Keywords

References

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