Numerical analysis has been carried out to investigate seawater flow field characteristics with various current directions near the manganese nodule mining device. Seawater flow near the collecting device is largely influenced by the sea current direction, especially along the downstream of the rear system. Predicted flow velocity distributions are analyzed with turbulent kinetic energy and drag force. There is big flow field variation when the direction angle between the mining device and seawater current flow approaches to 30°~ 120°, and flow velocity along the rear region of 60° becomes faster than 180°. Averaged turbulent kinetic energy at 180° also becomes low, about 57% higher at 60°. These results from the study can be applicable to the optimum design of manganese nodule collecting system in the deep seawater flow.

ABSTRACT
 1. 서론
 2. 수치 해석 방법
  2.1 지배 방정식
  2.2 해석 모델
  2.3 물성치 및 경계조건 설정
 3. 결과 및 고찰
  3.1 집광기주변에서의 해수유속 변화
  3.2 집광기 주변의 유속 및 난류운동에너지 분포 특성
  3.3 집광기 후류영역에서의 난류운동에너지 변화 특성
  3.4 난류운동에너지와 항력변화
 4. 결론
 후기
 References

• 채용배(Graduate school in Department of Mechanical Engineering at Wonkwang University) | Yong-Bae Chae
• 임성진(Graduate school in Department of Mechanical Engineering at Wonkwang University) | Sung-Jin Lim
• 이상호(Department of Mechanical Engineering at Wonkwang University) | Sang-Ho Lee Corresponding Author