Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Feasible Approach for Image Reconstruction in Two Phase Flow Problems

이상유동에서의 영상복원을 위한 효율적 기법

  • Cheon, W.G. (Research Institute of Advanced Technology College of Engineering, Cheju National University) ;
  • Lee, H.J. (Research Institute of Advanced Technology College of Engineering, Cheju National University) ;
  • Lee, Y.J. (Research Institute of Advanced Technology College of Engineering, Cheju National University) ;
  • Kim, M.C. (Research Institute of Advanced Technology College of Engineering, Cheju National University)
  • Published : 2005.03.30
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Abstract

본 논문은 압력차로 인한 유체의 유동장에서 서스펜션의 입자 밀도를 분포 규명하기 위해 적용할 수 있는 Electric Impedance Tomography (EIT)의 새로운 기법에 대한 효율성을 다루고 있다. Regularized Newton-Raphson iterative method를 근간으로 inverse problem의 해를 구하는데, 이는 곧 목적 함수(object function)를 몇 가지의 제한조건(constraints) 하에서 최소화시키는 과정이라 할 수 있다. 한편, 관련 forward problem은 유한요소법(FEM)을 이용하여 해결하며, 기존의 연구와는 달리 선형 형상 함수(linear shape function)를 이용하여 전도도가 연속적인 물성치로 유동장에 분포되어 있는 것으로 가정하였다. 여러 경우의 test run에 대한 결과는 본 논문에서 적용한 방법론의 타당성을 보여 주고 있다. 태양에너지의 추출을 위해 직접촉식 열교환기가 종종 이용되고 있는데, 본 연구는 열교환기 내부의 분산 유체에 대한 해석에 일조를 할 수 있을 것으로 기대된다.

Keywords

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