Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Study on the Fluid Dynamics Modeling in Artificial Lung Assist Device

인공 폐 보조장치 내에서의 유체 유동 모델링에 대한 연구

  • Kim, Gi-Beum (Department of Pharmacology, Korea Zoonosis Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Park, Young-Ran (Department of Chemical Engineering, Graduate Schools, Chonbuk National University) ;
  • Kim, Shang-Jin (Department of Pharmacology, Korea Zoonosis Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Hong, Chul-Un (Division of Biomedical Engineering, College of Engineering, Chonbuk National University) ;
  • Kang, Hyung-Sub (Department of Pharmacology, Korea Zoonosis Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Kim, Jin-Shang (Department of Pharmacology, Korea Zoonosis Research Institute, College of Veterinary Medicine, Chonbuk National University) ;
  • Kim, Seong-Jong (Department of Thoracic and Cardiovascular Surgery, Chonbuk National University Medical Schools) ;
  • Kim, Min-Ho (Division of Chemical Engineering, College of Engineering, Chonbuk National University)
  • 김기범 (전북대학교 수의과대학 약리학교실.인수공통전염병연구소) ;
  • 박영란 (전북대학교 대학원 화학공학과) ;
  • 김상진 (전북대학교 수의과대학 약리학교실.인수공통전염병연구소) ;
  • 홍철운 (전북대학교 공과대학 바이오메디칼공학부) ;
  • 강형섭 (전북대학교 수의과대학 약리학교실.인수공통전염병연구소) ;
  • 김진상 (전북대학교 수의과대학 약리학교실.인수공통전염병연구소) ;
  • 김성종 (전북대학교 의학전문대학원 흉부외과학교실) ;
  • 김민호 (전북대학교 공과대학 화학공학부)
  • Published : 2011.04.30
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Abstract

In this study, the characteristic of fluid flow in the new type lung assist devices has been established using computational fluid dynamics(CFD). For the modeling, the hollow fiber was ignored, and vertical types and tangential types were used for the model. Which was to analyze the flow characteristics of the fluid flow model when there exists 1 and 2 input/output ports, and when the input/output ports is located at the center of the cylinder and at the tangential direction with the cylinder wall. The modeling results showed that it was possible to eliminate no-flow region(stagnant layer) as shown in the vertical type when an inlet and an outlet were installed on the tangential direction of the cylinder as shown in the tangential type. Also, in the tangential type, vortex-type flow appeared as dominant, and it showed a complicated flow not deviated to one side. When the number of input/output was two, there was no deviated flow, and complicated flows were generated all across the tube. From the test result, it was found that input/output of flow was tangential type and complicated flows with no stagnant layer would be generated when there are two inputs/outputs, respectively.

본 연구에서는 혈관 내 인공 폐(intravenous lung assist device)를 개발하기 위하여 CFD를 사용하여 새로운 형태의 인공 폐 모형에 대한 유체의 흐름 특성을 모델링하였다. 모델링을 위하여 중공사(hollow fiber)는 무시하였으며 vertical type과 tangential type이 모델로 사용되었다. 유체의 흐름 특성을 예측하기 유체의 입출구로 1개로 하였을 때와 2개로 하였을 때 그리고 입출구를 관의 중심부(vertical)와 관 벽의 접선방향(tangential)에 위치하였을 때의 흐름 특성을 파악 하였다. 실험 결과, tangential type과 같이 원통의 접선 방향으로 유체의 입구와 출구를 설정할 경우 vertical type에서 나타나는 흐름이 없는 영역(정체층)을 제거할 수 있었다. 또한 tangential type은 와류형태의 흐름이 지배적이며 한쪽으로 편중된 흐름이 아닌 복잡한 형태의 흐름이 발생하는 것으로 나타났다. 또한 유체의 입출구가 2개일 때 유체가 편중된 흐름이 발생하지 않고 관 전체에 복잡한 형태로 흐름이 발생하는 것으로 나타났다. 실험 결과를 통하여 우리는 유체가 유입되는 입구와 출구가 tangential type이며 각각 2개일 때 유체의 흐름이 복잡하며 정체층이 발생하지 않는 흐름이 발생한다는 것을 확인할 수 있었다.

Keywords

References

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