Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Characteristics of the Flow and Heat Transfer around a Wavy Cylinder

파형 실린더 주위의 유동 및 열 전달 특성

  • Lee, Chang-Yeol (Department of Naval Architecture and, Ocean Engineering, Pusan National University) ;
  • Seo, Jang-Hoon (Department of Naval Architecture and, Ocean Engineering, Pusan National University) ;
  • Hung, Pham-Anh (Department of Naval Architecture and, Ocean Engineering, Pusan National University) ;
  • Yoon, Hyun-Sik (Advanced Ship Engineering Research Center, Pusan National University) ;
  • Chun, Ho-Hwan (Department of Naval Architecture and, Ocean Engineering, Pusan National University)
  • 이창열 (부산대학교 조선해양공학과) ;
  • 서장훈 (부산대학교 조선해양공학과) ;
  • 팜안훙 (부산대학교 조선해양공학과) ;
  • 윤현식 (부산대학교 첨단조선공학연구센터) ;
  • 전호환 (부산대학교 조선해양공학과)
  • Published : 2009.02.20
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Abstract

Three-dimensional characteristics of fluid flow and heat transfer around a wavy circular cylinder having sinusoidal variation in cross sectional area along the spanwise direction are numerically investigated using the immersed boundary method. The three different wavelengths of ${\pi}4$, ${\pi}3$ and ${\pi}2$ at the fixed wavy amplitude of 0.1 have been considered to investigate the effects of waviness especially on the forced convection heat transfer around a wavy cylinder when the Reynolds and Prandtl numbers are 300 and 0.71, respectively. The present computational results for a wavy cylinder are compared with those for a smooth cylinder. The time- and total surface-averaged Nusselt number for a wavy cylinder with ${\lambda}={\pi}/2$ is larger than that for a smooth cylinder, whereas that with ${\lambda}={\pi}/4$ and ${\pi}/3$ is smaller than that for a smooth cylinder. However, because the surface area exposed to heat transfer for a wavy cylinder is larger than that for a smooth cylinder, the total heat transfer rate for a wavy cylinder with different wavelengths of ${\lambda}={\pi}/4$, ${\pi}/3$ and ${\pi}/2$ is larger than that for a smooth cylinder.

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References

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