Ballast water of ten billion tons are transferred by the ship annually in the world. Because alien creatures are destroying aquatic ecosystems, ballast water treatment is needed. Physical methods of treatment using the filtration method is hydrocyclone. The advantage of hydrocyclone is to create a simple structure and a easy separation of good performance. A commercial CFD code CFX 11.0 is applied to analyze hydrocyclone. According to the shape changes of the hydrocyclone, separation performance was compared. The results show that when you reduce the height of hydrocyclone, hydrocyclone separation efficiency is lowered.

Abstract
 1. 서론
 2. Hydrocyclone의 분리 이론
 3. 수치해석
  3.1 해석 대상 hydrocyclone
  3.2 격자의 생성
  3.3 경계조건
  3.4 유동지배방정식
 4. 결과
  4.1 속도 및 압력
  4.2 와도
  4.3 분리 성능
 5. 결론
 참고문헌

• 김진구(충북도립대학 기계자동차과) | J. G. KIM