Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Numerical Study on the Effect of a Microfin with a Flexible Up-down Movement on Heat Transfer using a Fluid-structure Interaction (FSI) Method

양방향 유체-고체 연성해석을 통한 표면 위 미세날개의 진동이 열전달에 미치는 영향 분석

  • Park, Ki-Hong (Department of Energy Engineering, Pusan National Univ.) ;
  • Min, June-Kee (Rolls-Royce University Technology Center, Pusan National Univ.) ;
  • Kim, Jin-Kyu (Rolls-Royce University Technology Center, Pusan National Univ.) ;
  • Kang, Seok-Hoon (Department of Precision Engineering, Pusan National Univ.) ;
  • Kim, Seong-Jin (Department of Precision Engineering, Pusan National Univ.) ;
  • Park, Sang-Hu (School of Mechanical Engineering, Pusan National Univ.)
  • 박기홍 (부산대학교 기계공학부 에너지시스템) ;
  • 민준기 (부산대학교 롤스-로이스 대학 기술센터) ;
  • 김진규 (부산대학교 롤스-로이스 대학 기술센터) ;
  • 강석훈 (부산대학교 기계공학부 정밀가공시스템) ;
  • 김성진 (부산대학교 기계공학부 정밀가공시스템) ;
  • 박상후 (부산대학교 기계공학부)
  • Received : 2011.02.24
  • Accepted : 2011.06.03
  • Published : 2011.08.01
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Abstract

A microfin on a heated surface and its effects of the heat transfer has been investigated. The thickness of the fin is about 8 micrometer to allow the flexible up-down motion of the fin. Two-way complete FSI (Fluid-Structure Interaction) method has been applied for the analysis. Firstly, the deformation of a microfin due to the pulsating flow is evaluated using structure analysis. The flow and temperature patterns are predicted by CFD (Computational Fluid Dynamics) method. At each time step, using the pressure force and temperature distribution from CFD, the deformation of the wing is evaluated by FEM. Also in order to estimate the resonance probability, the natural frequency of the wing structure is calculated by modal analysis. The proposed numerical procedure was validated through experiment using a single fin. Through this work, we show that the increase of 40% in heat transfer capacity using the microfin has been compared with that of flat plate case.

Keywords

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